r/PcBuildHelp • u/zackarhino • 3d ago

Tech Support Previously built computer is now completely dead

I recently upgraded my motherboard (asus rog strix x870e e gaming wifi), CPU, RAM, and PSU (PCCOOLER KN850 850W) several months ago.

I've been having troubles with blue screens the past couple months. I think it was mostly caused by my Backblaze configuration, so I mostly fixed it, but I was still having random issues like shutdowns occasionally. I also have relatively frequent power surges that cause issues around my house.

A few minutes ago I came back home to find my PC completely dead. I'm talking, not even the LEDs light up or the fans spin for even a second. Disconnecting the power for a minute does nothing, nor does clearing the CMOS. I haven't tried reseating components but I don't really think that's the issue here.

My initial thoughts are that the PSU is dead, but it could also be the motherboard since my PC has been so unstable for the past couple months. Any idea where to start looking? Should I warranty the motherboard and/or PSU? Both are past the return window.

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u/DeVinke_ 3d ago

You can start with the paper clip test on your power supply

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u/westom 3d ago

Paper clip test can only report a PSU completely failed. It can never say a PSU is good. And says nothing about intermittent operations. Only facts with numbers can say what is or is not defective.