I recently had a power surge that damaged my partner's power supply unit (PSU). We bought a new one, but it didn't include a PCIe cable, so we're waiting for that to arrive. When we first tested the new PSU, the computer turned on, but we couldn't see anything on the screen since the PCIe cable was missing. After a few attempts, it seemed to load up and then shut down again. Today, I put my PSU back in the tower to give my partner a chance to use the computer while I'm away, but now it doesn't turn on at all. I also tried the upgraded PSU, but that one won't power the computer either. My original PSU still works fine when I plug it back in. Could I have accidentally disconnected something during the installation? What cables should I check? I'm really confused since everything was working fine yesterday, and we've already spent a lot on the new PSU and PCIe cable.
2 Answers
Make sure all your cables are securely plugged in, especially the CPU power cable. Try turning off the power switch on the back of the PSU, hold down the power button on the computer to drain any residual power, and then plug in just the essentials — the motherboard, CPU, GPU, and boot drive (don't forget the CPU cooler!). Sometimes, PSUs can struggle with a full load immediately, so simplifying the setup could help.
Check if your surge protector is damaged too. If the power surge was strong enough to fry the PSU, it might've also taken out your surge protector. It's a good idea to replace it if you didn’t have one before. Just a heads up, make sure to use a surge protector in the future to prevent this from happening again.
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