Koof said:
Recently we had an electrical storm go through and it somehow made its way onto our home network. --- I suppose this isn't really a tech failure on my part (surge protectors don't protect against lightning, and I suppose I could've unplugged everything, but that would just be a pain), but it still sucks.
Dude, I've been there. That really stinks. A ground-to-cloud lightning struck our home back in the 90's, split a 150 year old oak in half, landed in the house's ground-wiring, took out almost everything grounded inside the house (TV, dish, water heater, telephones, you name it). Not the computers though, but the telephone jacks virtually exploded! Nothing a fire extinguisher couldn't handle, fortunately.
(*harkle*)
Some big failures (been through a lot of them...) would include the installing of my Corsair TX850 (brand new). I installed it in a pretty neat PC (2008), and the PC did not start any more. I repeated the process on another PC, same results - both PC's did not start. I restored them, but to no avail, they both went ka-putt. Turns out the Corsair PSU was faulty, and shorted out both PC's on contact. Only an ATi Radeon 7000 survived, and even it is a bit funny sometimes.
Oh yeah, my sister once dropped her cellphone in liquid nitrogen. Don't ask how it happened, it's embarrassing

- It still worked, but the SIM-card froze. Literally...
During the construction of the newest PC (the old one accidentally burned due to cable shortage), once completed - did not start. Five hours of intense hardware diagnostics followed to no avail. Hey presto, the PSU-button was flicked off...
James Bond failed his mission so to speak. He forgot to refuel his car.