Lightning struck my house and apparently entered through the internet cable, damaging the internet equipment, home alarm system, and gaming PC. The computer will not power on at all. A repair counter said they would need to replace the motherboard for about $450 just to test whether the system could start, with no guarantee that anything else would work. The PC has an RTX 4070 Ti, a capable processor, and a gold-rated power supply from a CyberPower prebuilt. I'd like to recover as much of it as possible, especially if I can eventually give it to my oldest child. What is the most economical way to determine which components survived?
4 Answers
Be prepared for the possibility that the damage spread beyond the motherboard. I’ve seen surge-damaged computers appear to work and then develop more failures months later. If you do repair it, have every major component tested instead of assuming a motherboard replacement solves the problem.
Try a local repair business that can test individual parts and tell them the full lightning-strike story. If the computer cannot be economically repaired, ask them to leave it disassembled. The storage drive may still contain your files, and you can access it separately with a compatible USB drive adapter. Also, make sure they explain any reassembly charge before authorizing work.
The practical method is component swapping. A shop—or a friend with a compatible PC—can test the graphics card, RAM, processor, and drives one at a time in a known-working system. Even if the motherboard and power supply are dead, saving the 4070 Ti and other usable parts could make rebuilding much cheaper.
I’d take it to a reputable independent repair shop rather than approving an expensive motherboard replacement immediately. They should be able to test it with a known-good power supply and motherboard, then check whether the CPU, graphics card, memory, and storage still work. The power supply may have absorbed the surge, but lightning can also damage multiple parts, so there’s no guarantee everything failed in one place.
The power supply was a gold-rated unit that came with the CyberPower build, so I’m hoping it protected at least some of the other components.
That’s disappointing, but it may be safer to stop investing in it if several parts are compromised. I was hoping to pass it down, though I’d rather not give someone an unreliable machine.