On Monday, my desktop monitor decided to die. I sent my computer to restart for updates and it just suddenly gave up the ghost. The power button/light would come up, flicker and turn off, come up, flicker and turn off. The screen itself never came on. Something was very obviously wrong. After a bit of troubleshooting to be sure it was the monitor, I realized that it was no longer working and a suspicious "burning electronics" smell my wife had smelled near my computer recently was probably related.
So, I did what any clueless person does, I searched DuckDuckGo for anything related. And that led me to this video While this wasn't my exact monitor, it was the right manufacturer and with the suspicious "burning electronics" smell, the idea that one or more capacitors had popped seemed possible.
Now, I'm not an electrician. I can solder kinda ok (usually without burning myself). I have a basic understanding of electronics and know enough that I can look at a board and identify some of the components and what they might do. However, at this point the monitor was dead. It was destined for the landfill and I figured, "why the hell not?" The only thing I would lose is some time and maybe I would learn something along the way. And if I did succeed, I'd save myself a couple hundred dollars, prevent more e-waste and just generally do something that made me feel cool. So, I pulled out my toolkit and cracked my monitor open.
Inside I found a setup pretty similar to what the video showed. Specifically, there is a circuit board which is pretty likely the power supply. And sitting in a neat line were three capacitors which were bulging on top. Looking at the traces, all three capacitor bridged the same traces and I'm guessing they work in parallel somehow. I suspect that I had lost one or more when my wife smelled the burning electronics and the last one popped when I did the reboot. The monitor usually cycles into standby and comes back when I reboot and I guess that it led to just enough strain on the capacitor(s) this time to take them out. A few minutes work with a soldering iron, a solder sucker and solder wick and I had all three out and the holes cleaned out, ready for replacements (yes, they were all through-hole style).
Even better, all three capacitors were rated for the exact same voltage and capacitance (680uf 10V). Easy, I'll just pop down to the nearest Radio Shack, grab a few and.... Oh ya, it's not 1999. Getting any sort of small electronics part is actually a bit tough. Well fine, I ordered a 10 pack off Amazon. And then waited for them to arrive. They came today and I sat down to see if I could fix my monitor.
Soldering the new capacitors in place was only a few minutes work. I even have a 3d-printed resistor bending tool to get the spacing and bends in the legs pretty nice. Which was good as I just could not find capacitors of the right rating which were also the same diameter. The ones I got were about 2mm smaller. Parts replaced, I re-assembled my monitor, hooked it back up and... Well, it powered up correctly and the power button/light stayed blue, but there was nothing on the display.
Well shoot, this seemed close, but something was wrong. And then I remembered hearing a "pop" sound while moving some of the control boards around. Maybe I had disconnected a cable by accident or maybe I just didn't reconnect something right, or maybe I just fucked the whole thing up. So, I cracked the case back open (lesson learned: test before reassembling completely). I pulled the control boards back out and sure enough there was a ribbon cable which was half way unseated. I pushed that back in, put the control boards back in place (but left the case open), connected the monitor to my computer and fired it up. Never have I been so happy to see the GRUB menu.
I powered off the monitor, unplugged the cables and closed the case back up. And here I am now, writing a Lemmy post about it, using that monitor. Something destined to be e-waste, saved with less than $10 in components, a bit of easy solder work, and a willingness to just try.





