Last year, a friend was playing some DOTA 2 during a rainstorm on a PC I sold him for 100 bucks or so when lightning struck. After that the PC didn't boot, after some basic troubleshooting I came to the conclusion that it was just not worth the time to fix such a cheap PC. I verified that the video card and RAM still worked so I chucked them into another PC and got him up and running with that. The hard drive would not detect when I plugged it into my PC (though it would spin and get warm) I did not try turning on the power supply due the potential hazard and instead threw it in the trash. I then replaced the PSU with another one I had laying around for troubleshooting purposes. I removed the motherboard and removed all components from it (heatsinks included) After inspection, I found no visible evidence of physical damage.
When I power the zapped system on, the fans spin up, I get a Post screen that says something like: BIOS AUTHORIZED FOR ACER AMERICA ONLY, but nothing else. NOTE: I cannot actually go into the BIOS, I just get a POST screen.
Past that, I have tried cleaning the motherboard, changing RAM, removing ram (results in endless beeping as it should.) One other thing worth mentioning is that I can only get a video signal out the motherboard, if I plug in a dGPU the fans spin up, but no video out.
My suspicion is that the CPU is toast, but the motherboard is OK and that the reason the video card turns on, but has no video out is because the motherboard is powering it, but cannot display anything because the cpu is needed to send data to the gpu. Also, the motherboard seems to behave normally to things like missing RAM or missing CPU. I can buy a replacement CPU for just 9 bucks.
AMD A6 3620
ACER OEM Motherboard
8GB generic DDR3 RAM
GTX 750 ti (optional)
DELL OEM 265 Watt PSU
I'm only trying to fix this for fun, I don't actually need this system to run, as I have several others.