I usually have access to so much hardware, I never THOUGHT I could get too attached to any particular piece. But recently, a fairly rock solid PC was giving me serious issues. Unexpected rebooting, failing to detect the graphics card, BIOS beeping giving different messages, unexplained blank screens. By now I would be trying to get someone to get a new PC, but I installed a new power supply, different hard drives, and just kept limping along. Removed most of the components, and STILL had issues, where it was unusable and unstable at best.
While working on it, I was finding out what the different BIOS beep codes (the mysterious morse code like beeps a computer makes if it cannot display anything or start booting up) were telling me.
I came across this post at Via Arena, which told me that at the moment, my computer was convinced there was no graphics card installed. It also mentioned further down to check for leaking capacitors. It wasn't until a little while ago, I was delving in yet again, to remove even more, and tried to brush away what I mistakenly took for dust. It was hard, and looked just like an old battery which has split and is leaking its innards.
I had to sit myself down, and break the news to myself, that it was indeed time to let it go and pass on quietly.
**UPDATE** From Draele in the comments, a perfect ending.
You can see examples of normal, and leaking, capacitors here.