I am so happy about this.
Today I opened up the Dell DL-1428 monitor that came with the boxed Dell Exclaim 486/50 PC I bought recently (from 1994). The monitor works beautifully but was having a very faint periodic blip where the screen would dim very briefly. It wasn't noticeable at max brightness and contrast (which looks phenomenal on this old screen), but with the contrast turned down even a little the dip in brightness every few seconds was noticeable.
Anyway, I opened up the monitor and was amazed not only at how clean everything was inside, but at how accessible and easy to work on it is.
After looking around for anything that looked off I actually spotted a single 25v 100uf cap that had a lot of dark soot under and near it on the PCB, like it had blown and vented out the bottom or something.
Nothing else on the board looked like this, so I pulled the cap, cleaned the soot from the PCB, and soldered in a brand new KEMET 25v 100uf cap. I am very pleased to say that I cannot get this thing to flicker now! Unless this is just a fluke... it seems like the only problem with this thing is now fixed. The computer itself runs flawlessly, and only needs a new battery at this point (it uses an external battery on a wire thankfully). I think the only quirk about the whole machine now is that the hard drive squeaks a bit while it's running, but that's only a minor annoyance and may actually go away with time. The thing likely sat unpowered for the past 26 years based on the latest dates of the files on the hard drive.
Last week I opened up the power supply and found a couple broken solder joints on the PCB, so I fixed those. Everything else in there looked great as well.
I am going to continue tinkering with this Dell and seeing what I can do with it but due to my limited space I will likely move this on to someone else once I'm done cleaning, refurbishing and playing with it. These seem ridiculously rare now and this one has been upgraded with a Media Vision PAS16 multimedia kit, complete with CD-ROM and Labtec speakers, and it came with the goofy multimedia demo software installed too.
Now for some blitting from the back buffer.