MOBO toast? Entirely blank screen, no POST data or anything

Posted by yinoryang@reddit | buildapc | View on Reddit | 4 comments

Hi,

This was very sudden, working-fine-one-day and nothing the next. There is nothing on the screen--completely blank--no POST data, nothing. Notes/troubleshooting so far:

RAM LEDs are lit
Liquid cooler LED is lit and cooler sounds like it is running
Case fan LEDs are lit and fans are running
GPU fan is running (GPU does not have LEDs)
I've tried all GPU ports and both onboard graphics ports, DP and HDMI
Monitor is working (tested with alternate source)
USB mouse is not lit.

MOBO: Prime B650M-A AX II GPU: PNY 4070 SSD: Kingston SNV2S1000G RAM: 16GB Delta Tforce rgb CPU: Ryzen 7-7700

-Frankenbuild with prebuilt mobo/CPU/RAM and parts I got from work.

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ouija_bh@reddit

Your motherboard has Q-LED Core, use it to troubleshoot.

yinoryang@reddit (OP)

Thank you, good advice, but it seems the mobo is some stripped-down edition for prebuilts without the lights, nor the power button LED light codes.

I assume you connected to the iGPU with the dGPU removed. I suggest you use another PSU.

Tried another PSU and the behavior was exactly the same. Troubleshooting/replacement MOBO ordered. Praying it's that and not the CPU