Possibly shorted motherboard

[yannickbovy]

I accidentally left my PSU turned on when replacing some case fans. My PC itself was turned off. When I took out my 4090 GPU to access my fans and then tried to put it back into the PCI slot of my X570-E motherboard, the computer suddenly turned on and then immediately turned off again (I suspect a short circuit). Since then I can't start the computer anymore. The motherboard shows no signs of life other than the red CPU connection LED if one of these cables is not properly connected, even when I try to start it with a screwdriver on the power pins. The power supply, RAM and GPU still work (tested at a friend). I have already replaced the CMOS battery and that doesn't help either. Do you have any ideas what I could try? Thank you in advance!

[Jiaszzz_ROG]

Hello, @yannickbovy 

May I ask if you have checked the CPU connection and verified that there are no bent pins in the socket as the red CPU Q-LED indicator is on?
We recommend performing a bare board test with minimal components in an insulated environment: install only the CPU on the motherboard, use integrated graphics (or a GPU if there are no integrated graphics), place a single RAM stick in the DIMM_A2 slot, and connect the PSU to see if it can boot.
If necessary, try cross-testing with another CPU.

If these steps do not resolve the issue, we suggest contacting your original place of purchase or dealer for further repair and inspection.

Thank you.

[yannickbovy]

Hi Jiaszzz,

Thank you for your reply.

I'm sorry if I did not explain well. It's not the CPU QLED indicator but the red led that comes on near where you plug in the CPU power cables on the motherboard if you don't do this properly (the only sign of life I can get out of this board).

I guess I will try to send it in for repair...

[Jiaszzz_ROG]

Hello, @yannickbovy 

According to the user manual, the LED indicator near the CPU power cable should indeed be the Q-LED.

The red Q-LED indicates a CPU anomaly detected during the boot process.

Thank you.