Broken P3 Celeron Heatsink Clip
A cheap piece of plastic broke, then ruined the processor and motherboard, too
Almost 3 years after building this computer for my mom, I got a call from her saying the computer wouldn't start up. So, after all the usual over-the-phone troubleshooting (is it plugged in?) I tell her to leave it alone and I'll take a look at it over the weekend.
When I pulled the side off the case and saw the heatsink hanging by it's power wires, I knew this wasn't going to be good.
Here's a picture of the broken clip: