I have 23 years experience with PCs and in that time I've only ruined THREE pieces of PC hardware. Two were obsolete* motherboards that I flashed the wrong BIOS to and the last was my own silly fault for working on my PC at about 4 in the morning and I plugged the power button connector into the IDE activity LED pins on the motherboard.
Don't do that. The power supply took about 30 seconds to go *BANG* with a pretty blue flash and a curl of smoke out the back. Nothing else was damaged.
*Ones I'd pulled from clients' PCs for upgrades. I NEVER take risks with client's hardware, I save that for my own stuff.
I research and follow the directions step by step, after reading them several times.
P.S. I do use a slightly magnetic screwdriver because it's a PITA getting some of those motherboard screws in. It's total BS that a magnetic screwdriver that can just hold onto a screw can cause any problems in computer hardware that has no electricity running through it.
The absolute funniest service call I had was when a customer brought in his office PC because it was doing random weird stuff. He'd brought it in before I got to the shop and the boss just told me to look at the box on the counter in the back. I took one look and burst out laughing. The entire side of the case was covered with magnetic business cards. The 'service' consisted of removing the cards then booting up and doing some basic tests. No charge and a quick lesson in why sticking magnets all over a PC wasn't a good idea.
