{"video_id":"fp_3ZqwnPkOjt","title":"Rebuilding my Water Damaged UPS","channel":"Linus Tech Tips","show":"Linus Tech Tips","published_at":"2024-08-22T16:53:00.032Z","duration_s":1092,"segments":[{"start_s":0.0,"end_s":6.5600000000000005,"text":"When one of my gaming systems spectacularly failed dumping water down the entire rest of the rack,","speaker":null,"is_sponsor":0},{"start_s":6.5600000000000005,"end_s":11.36,"text":"the most expensive piece of equipment I lost was this battery backup.","speaker":null,"is_sponsor":0},{"start_s":12.8,"end_s":18.96,"text":"Now the obvious thing to do when a piece of uh high voltage electrical equipment gets doused","speaker":null,"is_sponsor":0},{"start_s":18.96,"end_s":25.84,"text":"in water would be to buy a new one, but I have a better plan. You see battery backups are expensive","speaker":null,"is_sponsor":0},{"start_s":25.92,"end_s":30.56,"text":"and one of the most important parts, the lead acid batteries","speaker":null,"is_sponsor":0},{"start_s":32.4,"end_s":38.08,"text":"seem to be working just fine. No, that isn't how I checked them. To eBay I went and while I could","speaker":null,"is_sponsor":0},{"start_s":38.08,"end_s":44.0,"text":"have bought a lightly used unit sans battery, it was this shipping damaged one that caught my eye.","speaker":null,"is_sponsor":0},{"start_s":44.0,"end_s":50.4,"text":"Hey Tyman, have a look at what we're going to be working on today. Oh boy. Specifically it is","speaker":null,"is_sponsor":0},{"start_s":50.4,"end_s":57.76,"text":"thousands of dollars worth of shipping damage. I got this unit for just 500 bucks meaning that it","speaker":null,"is_sponsor":0},{"start_s":57.76,"end_s":64.4,"text":"could very well be worth the time consuming, not to mention dangerous process of transplanting the","speaker":null,"is_sponsor":0},{"start_s":64.4,"end_s":71.52,"text":"hopefully working internals from the shipping damaged unit into the uh well probably still good","speaker":null,"is_sponsor":0},{"start_s":71.52,"end_s":77.52,"text":"steel chassis of the original one. So we can hope. That's why I brought Tynan. He's going to help make","speaker":null,"is_sponsor":0},{"start_s":77.52,"end_s":82.4,"text":"sure that I don't die today. From my point of view there's two options. We can look at the original","speaker":null,"is_sponsor":0},{"start_s":82.4,"end_s":88.8,"text":"unit and try and diagnose what exactly in it may or may not be dead or we can look at the new unit","speaker":null,"is_sponsor":0},{"start_s":88.8,"end_s":95.2,"text":"which I have about 12 days to inform the seller if it doesn't work and we can determine if we think","speaker":null,"is_sponsor":0},{"start_s":95.2,"end_s":99.92,"text":"there's even a chance that transplanting those parts in here is going to make this fully functional.","speaker":null,"is_sponsor":0},{"start_s":99.92,"end_s":104.64,"text":"Let's open up the shipping damaged one. If only there was some way to remove these fasteners.","speaker":null,"is_sponsor":0},{"start_s":105.6,"end_s":112.56,"text":"Like a screwdriver from LTTstore.com. Now I have to confess to you I did something bad. I did open","speaker":null,"is_sponsor":0},{"start_s":112.56,"end_s":117.76,"text":"up the original one to have a look at it. I didn't touch anything which is very important because","speaker":null,"is_sponsor":0},{"start_s":118.48,"end_s":124.64,"text":"more than anything else we've ever done. Folks do not try this at home. This is high voltage,","speaker":null,"is_sponsor":0},{"start_s":124.64,"end_s":129.04,"text":"high current electrical equipment. There are capacitors in here that if you touch them you will","speaker":null,"is_sponsor":0},{"start_s":129.04,"end_s":134.88,"text":"die. And the batteries. That too. Oh yeah I fooled around with the batteries too. That's why I'm","speaker":null,"is_sponsor":0},{"start_s":134.88,"end_s":138.88,"text":"pretty sure that they're working but if you wanted to validate that for me then that would probably","speaker":null,"is_sponsor":0},{"start_s":138.88,"end_s":144.32,"text":"be really good. Tynan's background is what are you like mechatronics? Mechatronics engineering.","speaker":null,"is_sponsor":0},{"start_s":144.32,"end_s":151.6,"text":"Yeah yeah so some mechanical, some electronics. Oh grief. Yeah let us have batteries. He told me","speaker":null,"is_sponsor":0},{"start_s":151.6,"end_s":155.28,"text":"when he came in today that he was worried we might be doing the lithium ion when I was like","speaker":null,"is_sponsor":0},{"start_s":156.24,"end_s":164.88,"text":"no I know much better than to fool around with any lithium ion battery this. 196 volts. It's pretty","speaker":null,"is_sponsor":0},{"start_s":164.88,"end_s":172.64,"text":"clear that some of these boards did get a little bit rough housed in shipping like this one. Yeah","speaker":null,"is_sponsor":0},{"start_s":172.64,"end_s":179.04,"text":"that looks very destroyed. I've seen so much worse than this. The outside is really bad and you can","speaker":null,"is_sponsor":0},{"start_s":179.04,"end_s":186.64,"text":"tell this thing took some bangs. Yeah. But like most of it looks fine. What's safe to touch?","speaker":null,"is_sponsor":0},{"start_s":187.2,"end_s":192.8,"text":"Like these wires for sure. Yeah. This shroud probably maybe depending what's under it. Everything's","speaker":null,"is_sponsor":0},{"start_s":192.8,"end_s":198.4,"text":"probably safe but we'll double check. Boards designed like this should have bleed resistors on","speaker":null,"is_sponsor":0},{"start_s":198.4,"end_s":205.2,"text":"any of the big capacitors so they should discharge in a safe time but you don't want to assume that.","speaker":null,"is_sponsor":0},{"start_s":206.0,"end_s":209.52,"text":"How do we check? Looks like there's a whole bunch of touch points on","speaker":null,"is_sponsor":0},{"start_s":210.16,"end_s":214.72,"text":"a lot of the main traces that should be able to be measured. Before you get to probulating","speaker":null,"is_sponsor":0},{"start_s":214.72,"end_s":218.8,"text":"those should we change gears and have a look at the water damaged one to see if there's any","speaker":null,"is_sponsor":0},{"start_s":218.8,"end_s":223.44,"text":"clues as to what we may or may not need to salvage. For sure. This could be good because","speaker":null,"is_sponsor":0},{"start_s":223.44,"end_s":228.32,"text":"what's missing from the shipping damaged one is all of the boards associated with the interface","speaker":null,"is_sponsor":0},{"start_s":228.32,"end_s":236.16,"text":"and the display which I mean clearly didn't get at least much water on it. Does anything jump out","speaker":null,"is_sponsor":0},{"start_s":236.16,"end_s":243.52,"text":"at you immediately here? It's really dusty. We moved all the equipment in while the house was","speaker":null,"is_sponsor":0},{"start_s":243.52,"end_s":251.12,"text":"kind of still a construction zone. That's on me. I think I noticed something. The new one is Rev03","speaker":null,"is_sponsor":0},{"start_s":251.84,"end_s":258.08,"text":"and the original one is Rev00P. See even when you revise a product that doesn't mean that you","speaker":null,"is_sponsor":0},{"start_s":258.08,"end_s":262.4,"text":"revise every component of the product. They may be completely intercompatible other than they had","speaker":null,"is_sponsor":0},{"start_s":262.4,"end_s":267.52,"text":"to change a supplier for a part and they just revved it so that they could keep track of that.","speaker":null,"is_sponsor":0},{"start_s":267.52,"end_s":272.88,"text":"In terms of immediate water damage things the circuit breakers obviously got dunked on so that","speaker":null,"is_sponsor":0},{"start_s":272.88,"end_s":279.28,"text":"may be a problem. Tell me this. What would be your methodical way to approach something like this?","speaker":null,"is_sponsor":0},{"start_s":279.28,"end_s":286.72,"text":"Would you replace one part and try to fire it up or would you just go wholesale complete change out","speaker":null,"is_sponsor":0},{"start_s":286.72,"end_s":292.56,"text":"and then hope for the best? How much time we have. Probably first thing is figuring out if there's","speaker":null,"is_sponsor":0},{"start_s":292.56,"end_s":297.04,"text":"anything obvious that's not connected that's supposed to be. Everything should be connected. I","speaker":null,"is_sponsor":0},{"start_s":297.04,"end_s":302.32,"text":"haven't actually touched anything in here because I knew that I was out of my depth. Yeah and we're","speaker":null,"is_sponsor":0},{"start_s":302.32,"end_s":309.44,"text":"meant like shorts or disconnects. Oh sure other possible spots are over the fan here in fact you","speaker":null,"is_sponsor":0},{"start_s":309.44,"end_s":315.12,"text":"can see where the water drips were coming through here. There are no holes conveniently over this","speaker":null,"is_sponsor":0},{"start_s":315.2,"end_s":323.44,"text":"board which is good. These holes are obviously right there and then there were also holes here.","speaker":null,"is_sponsor":0},{"start_s":323.44,"end_s":330.24,"text":"What's this? That's a plug. That should not be a problem. Okay and then these holes were over the","speaker":null,"is_sponsor":0},{"start_s":330.24,"end_s":335.36,"text":"battery compartment which survived and is now completely dry. This happened over a month ago","speaker":null,"is_sponsor":0},{"start_s":335.36,"end_s":340.56,"text":"now and it seems fine. I don't think the breakers are damaged to the point where it would matter","speaker":null,"is_sponsor":0},{"start_s":340.56,"end_s":346.0,"text":"because either they're connected or they're not connected and they're connected. Oh balls.","speaker":null,"is_sponsor":0},{"start_s":348.08,"end_s":352.08,"text":"It's probably not going to be an easy fix. There's a chance that there's","speaker":null,"is_sponsor":0},{"start_s":353.04,"end_s":359.44,"text":"like some of the fuses for the inputs blue or maybe some of the control board or what looks","speaker":null,"is_sponsor":0},{"start_s":359.44,"end_s":368.72,"text":"like a control board back here fried. Oh could this be as simple as a safety feature working for","speaker":null,"is_sponsor":0},{"start_s":368.72,"end_s":377.76,"text":"safety and our fuse blue? Quite possibly. Hey blown fuses. We know this because we're getting","speaker":null,"is_sponsor":0},{"start_s":377.76,"end_s":383.28,"text":"a continuity beep on the shipping damaged unit and we are not getting a continuity beep on these","speaker":null,"is_sponsor":0},{"start_s":383.28,"end_s":390.24,"text":"units. This is input from the batteries to the inverter. This looks like it might be the ground","speaker":null,"is_sponsor":0},{"start_s":390.24,"end_s":396.88,"text":"return. Nope what is that for? What I'm gathering is you don't want to just put the new fuses in","speaker":null,"is_sponsor":0},{"start_s":396.88,"end_s":402.48,"text":"because then we don't have backup fuses if they blow. Depends on how dangerous you want to live","speaker":null,"is_sponsor":0},{"start_s":402.48,"end_s":407.12,"text":"because yeah we have one attempt at these fuses not blowing again. Right. We should probably take","speaker":null,"is_sponsor":0},{"start_s":407.12,"end_s":413.12,"text":"these out of the chassis. Okay I can do that. Cool I'll do that one. One of the things I am","speaker":null,"is_sponsor":0},{"start_s":413.12,"end_s":418.56,"text":"concerned about for this is the second board underneath which may have been water damaged","speaker":null,"is_sponsor":0},{"start_s":418.56,"end_s":423.52,"text":"more than we can see here and this other fuse looks like it goes straight down. Whenever you're","speaker":null,"is_sponsor":0},{"start_s":423.52,"end_s":427.52,"text":"looking at an electrical system like this for capacitors you want to look for anything that's","speaker":null,"is_sponsor":0},{"start_s":427.52,"end_s":432.24,"text":"50 volts rated or higher. I would recommend checking everything but those are the ones you","speaker":null,"is_sponsor":0},{"start_s":432.24,"end_s":442.88,"text":"really want to look for. 275. So we want to check the big oh I didn't even see that one big and","speaker":null,"is_sponsor":0},{"start_s":442.88,"end_s":447.76,"text":"then you want to see look for the two sides of the capacitor. In this case there's a whole bunch of","speaker":null,"is_sponsor":0},{"start_s":447.76,"end_s":454.64,"text":"vias around on these traces so you can just find traces on both sides, probe across it and you","speaker":null,"is_sponsor":0},{"start_s":454.64,"end_s":460.64,"text":"just want to see that it's zero or close to zero. Now I noticed you have this set to volts DC but","speaker":null,"is_sponsor":0},{"start_s":460.64,"end_s":466.88,"text":"this says it's rated for 275 volts AC. Yeah capacitors are rated differently for AC versus DC","speaker":null,"is_sponsor":0},{"start_s":466.88,"end_s":471.36,"text":"depending on the type but when you're trying to make sure something's de-energized you want to","speaker":null,"is_sponsor":0},{"start_s":471.36,"end_s":478.32,"text":"measure DC because AC can't exist when it's unplugged. I'm excited they never let me play with","speaker":null,"is_sponsor":0},{"start_s":478.32,"end_s":485.12,"text":"stuff like this. That's why I'm here. My only thing is that if I ever die on camera I expect","speaker":null,"is_sponsor":0},{"start_s":485.12,"end_s":489.52,"text":"the company to monetize it to get that cheddar. I know it doesn't matter because they design","speaker":null,"is_sponsor":0},{"start_s":489.52,"end_s":494.8,"text":"around it but it always sketches me out when you screw a metal screw with a metal washer directly","speaker":null,"is_sponsor":0},{"start_s":494.8,"end_s":500.96,"text":"onto a PCB. I just don't like it. Well it's probably a good thing they can cause fires sometimes","speaker":null,"is_sponsor":0},{"start_s":501.92,"end_s":507.44,"text":"while I was doing some research for this shoot I found a nice eaten handbook that I found","speaker":null,"is_sponsor":0},{"start_s":507.44,"end_s":514.4,"text":"extraordinarily entertaining. Oh. Super professional. Oh my god. Professor Watson. I love him. The","speaker":null,"is_sponsor":0},{"start_s":514.4,"end_s":524.0,"text":"particular page that really got me was this one. Nine ways beer and UPS's are alike. Okay.","speaker":null,"is_sponsor":0},{"start_s":525.6,"end_s":528.96,"text":"Here she comes. Oh perfect I can look at that now. Okay I'm not going to break anything.","speaker":null,"is_sponsor":0},{"start_s":531.76,"end_s":537.92,"text":"Nice solder job eaten. That's quality. I didn't realize these were pastures. Yeah it took me a","speaker":null,"is_sponsor":0},{"start_s":537.92,"end_s":544.32,"text":"minute to figure that out too. They go into what look like gigantic chunky ground pins. It's it's","speaker":null,"is_sponsor":0},{"start_s":544.32,"end_s":548.4,"text":"there's essentially bust bars between the boards so that's how they're getting lots of power in","speaker":null,"is_sponsor":0},{"start_s":548.4,"end_s":554.08,"text":"between the two boards without having to own wires. It's kind of funky though that they just use","speaker":null,"is_sponsor":0},{"start_s":554.08,"end_s":558.88,"text":"giant standoffs. I mean metal's metal. Yeah and if it's metal then it's metal but like.","speaker":null,"is_sponsor":0},{"start_s":558.96,"end_s":563.52,"text":"And they're brass. Look at this shmoo. Oh I mean. We thought the top was bad. Yeah look","speaker":null,"is_sponsor":0},{"start_s":564.08,"end_s":569.52,"text":"giant capacitor bank. Whoa. Whoa look at the size of the bleed resistors. Yeah.","speaker":null,"is_sponsor":0},{"start_s":571.68,"end_s":576.64,"text":"Before we tear them both completely apart what are the odds that the short in the breaker","speaker":null,"is_sponsor":0},{"start_s":576.64,"end_s":583.52,"text":"would have caused those fuses to blow? It would have had to have been a short between the breakers","speaker":null,"is_sponsor":0},{"start_s":583.52,"end_s":589.12,"text":"because one breaker is a single phase of power. Yeah. So it would have to short across two phases","speaker":null,"is_sponsor":0},{"start_s":589.12,"end_s":593.92,"text":"for those to blow and in theory these should break if anything downstream of them fails.","speaker":null,"is_sponsor":0},{"start_s":593.92,"end_s":598.24,"text":"But if that were true then why would you need fuses anyway? Because you're dealing with enough","speaker":null,"is_sponsor":0},{"start_s":598.24,"end_s":602.48,"text":"power that if something goes wrong your board's going to melt. Right. Your hands are small right?","speaker":null,"is_sponsor":0},{"start_s":602.48,"end_s":607.92,"text":"Oh yeah. Cool. That's my superpower. I will need your small hands to get that exact connector out.","speaker":null,"is_sponsor":0},{"start_s":608.72,"end_s":613.76,"text":"Uh all right cool. I think it's dead. It looks like it's dead. I call dead.","speaker":null,"is_sponsor":0},{"start_s":614.96,"end_s":619.04,"text":"Oh yes. Okay we found another dead fuse this time on the bottom board.","speaker":null,"is_sponsor":0},{"start_s":620.0,"end_s":627.28,"text":"Huh all the fuse is blue. The system works. Oh yeah okay. Actually getting a close-up of","speaker":null,"is_sponsor":0},{"start_s":627.28,"end_s":634.8,"text":"the two fuses is probably interesting because here's the not f***ed one. Oh yeah. Oh there's","speaker":null,"is_sponsor":0},{"start_s":634.8,"end_s":643.36,"text":"your problem. Hey we found it. We were looking at the top. Yeah that's not good. Okay. That's very","speaker":null,"is_sponsor":0},{"start_s":643.36,"end_s":648.88,"text":"not good. Okay well no that's great. Now I don't know why it's dead. Yeah. I actually see where some","speaker":null,"is_sponsor":0},{"start_s":648.88,"end_s":656.0,"text":"of the electricity was breaking through the solder mask around the edge of the trace. Oh cool. That","speaker":null,"is_sponsor":0},{"start_s":656.0,"end_s":662.4,"text":"would have uh electrolyzed the water. So this fuse probably tried to save everything else but","speaker":null,"is_sponsor":0},{"start_s":662.4,"end_s":668.08,"text":"it was completely soaked in water and never stood a chance unfortunately. Thank you for your service.","speaker":null,"is_sponsor":0},{"start_s":670.08,"end_s":674.96,"text":"I found some more hidden and sneaky shipping damage on one of the boards that got a little bit","speaker":null,"is_sponsor":0},{"start_s":674.96,"end_s":682.24,"text":"crunched. Oh. It doesn't look like it's damaged. It'll impact anything but I'll be taking a closer","speaker":null,"is_sponsor":0},{"start_s":682.24,"end_s":688.56,"text":"look at this board after we get it out. Okay I have bad news. I believe this is a different revision","speaker":null,"is_sponsor":0},{"start_s":688.56,"end_s":694.8,"text":"than the one that's in here. Yeah. So we may need this board to work. Yeah. Like your IC is","speaker":null,"is_sponsor":0},{"start_s":694.8,"end_s":702.4,"text":"completely different from mine. There's the crunch. Oh that might be fine. Yeah like it's","speaker":null,"is_sponsor":0},{"start_s":702.4,"end_s":706.88,"text":"probably fine. That might just be a ground or something right. I'm not taking everything out","speaker":null,"is_sponsor":0},{"start_s":706.88,"end_s":712.16,"text":"of here because we decided that we were going to keep the receptacles and also uh. This side is","speaker":null,"is_sponsor":0},{"start_s":712.16,"end_s":717.6,"text":"super mangled on this one. Yeah for the input so I guess we just leave all of that. Yeah. Which is","speaker":null,"is_sponsor":0},{"start_s":717.6,"end_s":723.6,"text":"kind of convenient because it means we're not actually rewiring that much. So is this it? Yeah","speaker":null,"is_sponsor":0},{"start_s":723.6,"end_s":728.64,"text":"I think we just put it back together. Okay good luck everybody. Now under normal circumstances","speaker":null,"is_sponsor":0},{"start_s":728.64,"end_s":734.0,"text":"I would absolutely look at something like this and I'd go oh man let's just let's do a quick test","speaker":null,"is_sponsor":0},{"start_s":734.0,"end_s":739.76,"text":"boot of it you know on the bench but we can't. We don't even have a way of connecting the top","speaker":null,"is_sponsor":0},{"start_s":739.76,"end_s":744.24,"text":"board to the bottom board without screwing the whole thing together anyway. Also from a safety","speaker":null,"is_sponsor":0},{"start_s":744.24,"end_s":750.08,"text":"standpoint this chassis protects us from even if we're careful accidentally touching something","speaker":null,"is_sponsor":0},{"start_s":750.08,"end_s":756.0,"text":"that we really don't want to touch. Yeah there were I think seven or six hundred volt caps under here.","speaker":null,"is_sponsor":0},{"start_s":758.48,"end_s":763.76,"text":"Looks like I'm now ready for board number the two. No way. Yeah. I've got my breakers almost in.","speaker":null,"is_sponsor":0},{"start_s":763.76,"end_s":767.76,"text":"Dude this is going so fast. Yeah. We're going to plug this whole thing back together. It's going","speaker":null,"is_sponsor":0},{"start_s":767.76,"end_s":773.12,"text":"to turn right on. We're going to be like damn we're really good at this. And it was totally worth it.","speaker":null,"is_sponsor":0},{"start_s":773.12,"end_s":779.6,"text":"You know we've actually got a couple of videos coming soon on the economics of you know buying","speaker":null,"is_sponsor":0},{"start_s":779.6,"end_s":784.56,"text":"broken stuff on ebay and fixing them. We bought a half a dozen cpus and then I think we bought a","speaker":null,"is_sponsor":0},{"start_s":784.56,"end_s":789.76,"text":"bunch of motherboards. Then we're going to compare to the median us wage and see if we could make a","speaker":null,"is_sponsor":0},{"start_s":789.76,"end_s":794.72,"text":"living just like buying things on ebay and fixing them. This one was unintentional this was more","speaker":null,"is_sponsor":0},{"start_s":794.72,"end_s":800.4,"text":"just I really really really really really didn't want to buy another one. I don't know exactly why","speaker":null,"is_sponsor":0},{"start_s":800.4,"end_s":804.88,"text":"these are directional but I do see what looks like a diode marker on them which implies it's","speaker":null,"is_sponsor":0},{"start_s":804.88,"end_s":809.68,"text":"designed to go in a particular direction. Oh. Generally with these when they break","speaker":null,"is_sponsor":0},{"start_s":810.56,"end_s":815.52,"text":"they're high enough voltage that it'll maintain an arc even if the conductor has broken so they're","speaker":null,"is_sponsor":0},{"start_s":815.52,"end_s":822.72,"text":"filled with glass or sand that act to damp out the arc that's created. Okay here's your orientation.","speaker":null,"is_sponsor":0},{"start_s":823.28,"end_s":828.32,"text":"Cool. Gotta say I kind of feel like I'm waiting for the other shoe to drop a little bit here on","speaker":null,"is_sponsor":0},{"start_s":828.32,"end_s":834.32,"text":"this project. Same. It's going too good. Okay this cable was almost certainly supposed to be","speaker":null,"is_sponsor":0},{"start_s":834.32,"end_s":844.48,"text":"routed underneath but it makes it which means that's the last screw. What's your confidence level?","speaker":null,"is_sponsor":0},{"start_s":844.48,"end_s":851.92,"text":"Honestly pretty high. Now I have an idea. Okay. I was thinking we power it up with just the battery","speaker":null,"is_sponsor":0},{"start_s":851.92,"end_s":859.04,"text":"before actually plugging it into the wall. Sure. Okay. Do you need help? No. Sure. I'm used to having","speaker":null,"is_sponsor":0},{"start_s":859.04,"end_s":862.72,"text":"to carry around something heavy like this you know. With your tiny hands? Yeah yeah yeah.","speaker":null,"is_sponsor":0},{"start_s":866.48,"end_s":875.44,"text":"Squeaky noises and electronics. Yay! BP volt out of range. UPF shutting off. Battery pack.","speaker":null,"is_sponsor":0},{"start_s":875.44,"end_s":882.0,"text":"Let battery pack hold the dead range. Which is probably too low. Okay. Oh it's probably shutting","speaker":null,"is_sponsor":0},{"start_s":882.0,"end_s":886.96,"text":"itself off because it's too low. Too low. Yeah. Which is fine. So with a wall plug it's probably fine.","speaker":null,"is_sponsor":0},{"start_s":889.36,"end_s":890.88,"text":"Let's get the cover on. Yeah.","speaker":null,"is_sponsor":0},{"start_s":893.84,"end_s":901.28,"text":"That's all I gotta do is slide her in. I was about to say that's the last thing that's broken. I","speaker":null,"is_sponsor":0},{"start_s":901.28,"end_s":909.44,"text":"forgot my son's gaming rig. It's like she's working but she's limping. Okay. Nothing beeped or was","speaker":null,"is_sponsor":0},{"start_s":909.44,"end_s":922.4,"text":"disastrous. Here goes the plug. I hear the UPS. Let's go have a look. Load not powered.","speaker":null,"is_sponsor":0},{"start_s":924.24,"end_s":930.24,"text":"Emergency off. It says battery pack voltage out of range but we measured the voltage at about 200","speaker":null,"is_sponsor":0},{"start_s":930.24,"end_s":936.56,"text":"and on the top of the unit it says nominal pack voltage is 180 volts so that should be fine.","speaker":null,"is_sponsor":0},{"start_s":937.28,"end_s":945.28,"text":"Yeah. Dude, timing. Oh did we do a dumb? Ah well we didn't. Oh no. But I might have.","speaker":null,"is_sponsor":0},{"start_s":946.08,"end_s":952.32,"text":"See that little green RPO thing? It's supposed to be jumpers. Oh yeah it is. I know the thing.","speaker":null,"is_sponsor":0},{"start_s":952.32,"end_s":958.88,"text":"I've meant to put that back in. Yep that's important. After painstakingly paying super","speaker":null,"is_sponsor":0},{"start_s":958.88,"end_s":964.24,"text":"careful attention to everything we did internally I think we just were like oh we put it back together","speaker":null,"is_sponsor":0},{"start_s":964.24,"end_s":967.84,"text":"let's go test it and I think we might have just missed that jumper and that might be it.","speaker":null,"is_sponsor":0},{"start_s":967.84,"end_s":972.48,"text":"All powered on already. Okay hold on it's saying please wait right now. It worked. Online mode boom","speaker":null,"is_sponsor":0},{"start_s":972.48,"end_s":980.72,"text":"we're in. Oh that's terrible. That sucked. Yeah let's go. She's on. Load protected online mode.","speaker":null,"is_sponsor":0},{"start_s":980.72,"end_s":986.56,"text":"Okay okay yeah yeah yeah I'm plugging the PDU in. Okay okay go for it. Oh it's alive.","speaker":null,"is_sponsor":0},{"start_s":988.8,"end_s":994.8,"text":"He's drawing the power. Yeah this right here this is the face of a guy who just saved thousands of","speaker":null,"is_sponsor":0},{"start_s":994.8,"end_s":1001.84,"text":"dollars. Ah freaking awesome. Time to get everything plugged back in. Probably the worst thing that I've","speaker":null,"is_sponsor":0},{"start_s":1001.84,"end_s":1007.92,"text":"been doing lately. No no it's not even this is the fact that the 240 volt device on the other end","speaker":null,"is_sponsor":0},{"start_s":1007.92,"end_s":1014.56,"text":"which is the 115 inch TV because it's China. I just plugged it into a 120 fold outlet and I was like","speaker":null,"is_sponsor":0},{"start_s":1014.56,"end_s":1018.4,"text":"I don't know maybe it's going to be fine. My understanding is it does put additional strain","speaker":null,"is_sponsor":0},{"start_s":1018.4,"end_s":1023.52,"text":"on the power supply but shouldn't kill it immediately so I'm going to be powering my TV properly now.","speaker":null,"is_sponsor":0},{"start_s":1025.2,"end_s":1028.88,"text":"Properly. Well properly-ish. You know you can just","speaker":null,"is_sponsor":0},{"start_s":1028.88,"end_s":1034.0,"text":"re-terminate the plug onto the actual cable instead of Jerry rigging the cable to another","speaker":null,"is_sponsor":0},{"start_s":1034.0,"end_s":1038.48,"text":"cable right? Um yeah but this was convenient because I think the cable was already in the","speaker":null,"is_sponsor":0},{"start_s":1038.48,"end_s":1042.8,"text":"wall or something I don't know. Yeah you you can terminate it to the cable that was in the wall.","speaker":null,"is_sponsor":0},{"start_s":1042.8,"end_s":1049.28,"text":"Yeah I don't know there was a reason I did it that way I can't remember what it was. Okay boop boop boop boop","speaker":null,"is_sponsor":0},{"start_s":1049.84,"end_s":1057.84,"text":"and boop. One and a half thousand watts no problem baby efficiency 87 percent. I don't know if","speaker":null,"is_sponsor":0},{"start_s":1057.84,"end_s":1062.4,"text":"that's good but it's good enough for me and it's good enough to tell you. I can't tell if I'm","speaker":null,"is_sponsor":0},{"start_s":1062.4,"end_s":1068.96,"text":"blessed or cursed you know. Both. Like the water the random corrosion wouldn't have happened to","speaker":null,"is_sponsor":0},{"start_s":1068.96,"end_s":1075.28,"text":"someone who was blessed right but then someone who was cursed couldn't have possibly gotten a UPS","speaker":null,"is_sponsor":0},{"start_s":1075.28,"end_s":1080.32,"text":"of that caliber for five hundred dollars. And conveniently had someone on staff who knew how","speaker":null,"is_sponsor":0},{"start_s":1080.32,"end_s":1086.88,"text":"to rebuild it. Well yeah that too. If you guys enjoyed this video maybe go check out part one","speaker":null,"is_sponsor":0},{"start_s":1086.88,"end_s":1091.84,"text":"where the bulk of the diagnosis of the leak itself took place. Hey do you want to see the","speaker":null,"is_sponsor":0},{"start_s":1091.84,"end_s":1092.8,"text":"fitting. Yes.","speaker":null,"is_sponsor":0}],"full_text":"When one of my gaming systems spectacularly failed dumping water down the entire rest of the rack, the most expensive piece of equipment I lost was this battery backup. Now the obvious thing to do when a piece of uh high voltage electrical equipment gets doused in water would be to buy a new one, but I have a better plan. You see battery backups are expensive and one of the most important parts, the lead acid batteries seem to be working just fine. No, that isn't how I checked them. To eBay I went and while I could have bought a lightly used unit sans battery, it was this shipping damaged one that caught my eye. Hey Tyman, have a look at what we're going to be working on today. Oh boy. Specifically it is thousands of dollars worth of shipping damage. I got this unit for just 500 bucks meaning that it could very well be worth the time consuming, not to mention dangerous process of transplanting the hopefully working internals from the shipping damaged unit into the uh well probably still good steel chassis of the original one. So we can hope. That's why I brought Tynan. He's going to help make sure that I don't die today. From my point of view there's two options. We can look at the original unit and try and diagnose what exactly in it may or may not be dead or we can look at the new unit which I have about 12 days to inform the seller if it doesn't work and we can determine if we think there's even a chance that transplanting those parts in here is going to make this fully functional. Let's open up the shipping damaged one. If only there was some way to remove these fasteners. Like a screwdriver from LTTstore.com. Now I have to confess to you I did something bad. I did open up the original one to have a look at it. I didn't touch anything which is very important because more than anything else we've ever done. Folks do not try this at home. This is high voltage, high current electrical equipment. There are capacitors in here that if you touch them you will die. And the batteries. That too. Oh yeah I fooled around with the batteries too. That's why I'm pretty sure that they're working but if you wanted to validate that for me then that would probably be really good. Tynan's background is what are you like mechatronics? Mechatronics engineering. Yeah yeah so some mechanical, some electronics. Oh grief. Yeah let us have batteries. He told me when he came in today that he was worried we might be doing the lithium ion when I was like no I know much better than to fool around with any lithium ion battery this. 196 volts. It's pretty clear that some of these boards did get a little bit rough housed in shipping like this one. Yeah that looks very destroyed. I've seen so much worse than this. The outside is really bad and you can tell this thing took some bangs. Yeah. But like most of it looks fine. What's safe to touch? Like these wires for sure. Yeah. This shroud probably maybe depending what's under it. Everything's probably safe but we'll double check. Boards designed like this should have bleed resistors on any of the big capacitors so they should discharge in a safe time but you don't want to assume that. How do we check? Looks like there's a whole bunch of touch points on a lot of the main traces that should be able to be measured. Before you get to probulating those should we change gears and have a look at the water damaged one to see if there's any clues as to what we may or may not need to salvage. For sure. This could be good because what's missing from the shipping damaged one is all of the boards associated with the interface and the display which I mean clearly didn't get at least much water on it. Does anything jump out at you immediately here? It's really dusty. We moved all the equipment in while the house was kind of still a construction zone. That's on me. I think I noticed something. The new one is Rev03 and the original one is Rev00P. See even when you revise a product that doesn't mean that you revise every component of the product. They may be completely intercompatible other than they had to change a supplier for a part and they just revved it so that they could keep track of that. In terms of immediate water damage things the circuit breakers obviously got dunked on so that may be a problem. Tell me this. What would be your methodical way to approach something like this? Would you replace one part and try to fire it up or would you just go wholesale complete change out and then hope for the best? How much time we have. Probably first thing is figuring out if there's anything obvious that's not connected that's supposed to be. Everything should be connected. I haven't actually touched anything in here because I knew that I was out of my depth. Yeah and we're meant like shorts or disconnects. Oh sure other possible spots are over the fan here in fact you can see where the water drips were coming through here. There are no holes conveniently over this board which is good. These holes are obviously right there and then there were also holes here. What's this? That's a plug. That should not be a problem. Okay and then these holes were over the battery compartment which survived and is now completely dry. This happened over a month ago now and it seems fine. I don't think the breakers are damaged to the point where it would matter because either they're connected or they're not connected and they're connected. Oh balls. It's probably not going to be an easy fix. There's a chance that there's like some of the fuses for the inputs blue or maybe some of the control board or what looks like a control board back here fried. Oh could this be as simple as a safety feature working for safety and our fuse blue? Quite possibly. Hey blown fuses. We know this because we're getting a continuity beep on the shipping damaged unit and we are not getting a continuity beep on these units. This is input from the batteries to the inverter. This looks like it might be the ground return. Nope what is that for? What I'm gathering is you don't want to just put the new fuses in because then we don't have backup fuses if they blow. Depends on how dangerous you want to live because yeah we have one attempt at these fuses not blowing again. Right. We should probably take these out of the chassis. Okay I can do that. Cool I'll do that one. One of the things I am concerned about for this is the second board underneath which may have been water damaged more than we can see here and this other fuse looks like it goes straight down. Whenever you're looking at an electrical system like this for capacitors you want to look for anything that's 50 volts rated or higher. I would recommend checking everything but those are the ones you really want to look for. 275. So we want to check the big oh I didn't even see that one big and then you want to see look for the two sides of the capacitor. In this case there's a whole bunch of vias around on these traces so you can just find traces on both sides, probe across it and you just want to see that it's zero or close to zero. Now I noticed you have this set to volts DC but this says it's rated for 275 volts AC. Yeah capacitors are rated differently for AC versus DC depending on the type but when you're trying to make sure something's de-energized you want to measure DC because AC can't exist when it's unplugged. I'm excited they never let me play with stuff like this. That's why I'm here. My only thing is that if I ever die on camera I expect the company to monetize it to get that cheddar. I know it doesn't matter because they design around it but it always sketches me out when you screw a metal screw with a metal washer directly onto a PCB. I just don't like it. Well it's probably a good thing they can cause fires sometimes while I was doing some research for this shoot I found a nice eaten handbook that I found extraordinarily entertaining. Oh. Super professional. Oh my god. Professor Watson. I love him. The particular page that really got me was this one. Nine ways beer and UPS's are alike. Okay. Here she comes. Oh perfect I can look at that now. Okay I'm not going to break anything. Nice solder job eaten. That's quality. I didn't realize these were pastures. Yeah it took me a minute to figure that out too. They go into what look like gigantic chunky ground pins. It's it's there's essentially bust bars between the boards so that's how they're getting lots of power in between the two boards without having to own wires. It's kind of funky though that they just use giant standoffs. I mean metal's metal. Yeah and if it's metal then it's metal but like. And they're brass. Look at this shmoo. Oh I mean. We thought the top was bad. Yeah look giant capacitor bank. Whoa. Whoa look at the size of the bleed resistors. Yeah. Before we tear them both completely apart what are the odds that the short in the breaker would have caused those fuses to blow? It would have had to have been a short between the breakers because one breaker is a single phase of power. Yeah. So it would have to short across two phases for those to blow and in theory these should break if anything downstream of them fails. But if that were true then why would you need fuses anyway? Because you're dealing with enough power that if something goes wrong your board's going to melt. Right. Your hands are small right? Oh yeah. Cool. That's my superpower. I will need your small hands to get that exact connector out. Uh all right cool. I think it's dead. It looks like it's dead. I call dead. Oh yes. Okay we found another dead fuse this time on the bottom board. Huh all the fuse is blue. The system works. Oh yeah okay. Actually getting a close-up of the two fuses is probably interesting because here's the not f***ed one. Oh yeah. Oh there's your problem. Hey we found it. We were looking at the top. Yeah that's not good. Okay. That's very not good. Okay well no that's great. Now I don't know why it's dead. Yeah. I actually see where some of the electricity was breaking through the solder mask around the edge of the trace. Oh cool. That would have uh electrolyzed the water. So this fuse probably tried to save everything else but it was completely soaked in water and never stood a chance unfortunately. Thank you for your service. I found some more hidden and sneaky shipping damage on one of the boards that got a little bit crunched. Oh. It doesn't look like it's damaged. It'll impact anything but I'll be taking a closer look at this board after we get it out. Okay I have bad news. I believe this is a different revision than the one that's in here. Yeah. So we may need this board to work. Yeah. Like your IC is completely different from mine. There's the crunch. Oh that might be fine. Yeah like it's probably fine. That might just be a ground or something right. I'm not taking everything out of here because we decided that we were going to keep the receptacles and also uh. This side is super mangled on this one. Yeah for the input so I guess we just leave all of that. Yeah. Which is kind of convenient because it means we're not actually rewiring that much. So is this it? Yeah I think we just put it back together. Okay good luck everybody. Now under normal circumstances I would absolutely look at something like this and I'd go oh man let's just let's do a quick test boot of it you know on the bench but we can't. We don't even have a way of connecting the top board to the bottom board without screwing the whole thing together anyway. Also from a safety standpoint this chassis protects us from even if we're careful accidentally touching something that we really don't want to touch. Yeah there were I think seven or six hundred volt caps under here. Looks like I'm now ready for board number the two. No way. Yeah. I've got my breakers almost in. Dude this is going so fast. Yeah. We're going to plug this whole thing back together. It's going to turn right on. We're going to be like damn we're really good at this. And it was totally worth it. You know we've actually got a couple of videos coming soon on the economics of you know buying broken stuff on ebay and fixing them. We bought a half a dozen cpus and then I think we bought a bunch of motherboards. Then we're going to compare to the median us wage and see if we could make a living just like buying things on ebay and fixing them. This one was unintentional this was more just I really really really really really didn't want to buy another one. I don't know exactly why these are directional but I do see what looks like a diode marker on them which implies it's designed to go in a particular direction. Oh. Generally with these when they break they're high enough voltage that it'll maintain an arc even if the conductor has broken so they're filled with glass or sand that act to damp out the arc that's created. Okay here's your orientation. Cool. Gotta say I kind of feel like I'm waiting for the other shoe to drop a little bit here on this project. Same. It's going too good. Okay this cable was almost certainly supposed to be routed underneath but it makes it which means that's the last screw. What's your confidence level? Honestly pretty high. Now I have an idea. Okay. I was thinking we power it up with just the battery before actually plugging it into the wall. Sure. Okay. Do you need help? No. Sure. I'm used to having to carry around something heavy like this you know. With your tiny hands? Yeah yeah yeah. Squeaky noises and electronics. Yay! BP volt out of range. UPF shutting off. Battery pack. Let battery pack hold the dead range. Which is probably too low. Okay. Oh it's probably shutting itself off because it's too low. Too low. Yeah. Which is fine. So with a wall plug it's probably fine. Let's get the cover on. Yeah. That's all I gotta do is slide her in. I was about to say that's the last thing that's broken. I forgot my son's gaming rig. It's like she's working but she's limping. Okay. Nothing beeped or was disastrous. Here goes the plug. I hear the UPS. Let's go have a look. Load not powered. Emergency off. It says battery pack voltage out of range but we measured the voltage at about 200 and on the top of the unit it says nominal pack voltage is 180 volts so that should be fine. Yeah. Dude, timing. Oh did we do a dumb? Ah well we didn't. Oh no. But I might have. See that little green RPO thing? It's supposed to be jumpers. Oh yeah it is. I know the thing. I've meant to put that back in. Yep that's important. After painstakingly paying super careful attention to everything we did internally I think we just were like oh we put it back together let's go test it and I think we might have just missed that jumper and that might be it. All powered on already. Okay hold on it's saying please wait right now. It worked. Online mode boom we're in. Oh that's terrible. That sucked. Yeah let's go. She's on. Load protected online mode. Okay okay yeah yeah yeah I'm plugging the PDU in. Okay okay go for it. Oh it's alive. He's drawing the power. Yeah this right here this is the face of a guy who just saved thousands of dollars. Ah freaking awesome. Time to get everything plugged back in. Probably the worst thing that I've been doing lately. No no it's not even this is the fact that the 240 volt device on the other end which is the 115 inch TV because it's China. I just plugged it into a 120 fold outlet and I was like I don't know maybe it's going to be fine. My understanding is it does put additional strain on the power supply but shouldn't kill it immediately so I'm going to be powering my TV properly now. Properly. Well properly-ish. You know you can just re-terminate the plug onto the actual cable instead of Jerry rigging the cable to another cable right? Um yeah but this was convenient because I think the cable was already in the wall or something I don't know. Yeah you you can terminate it to the cable that was in the wall. Yeah I don't know there was a reason I did it that way I can't remember what it was. Okay boop boop boop boop and boop. One and a half thousand watts no problem baby efficiency 87 percent. I don't know if that's good but it's good enough for me and it's good enough to tell you. I can't tell if I'm blessed or cursed you know. Both. Like the water the random corrosion wouldn't have happened to someone who was blessed right but then someone who was cursed couldn't have possibly gotten a UPS of that caliber for five hundred dollars. And conveniently had someone on staff who knew how to rebuild it. Well yeah that too. If you guys enjoyed this video maybe go check out part one where the bulk of the diagnosis of the leak itself took place. Hey do you want to see the fitting. Yes."}