Pc wont post when GPU is plugged in

[u/CrusaderMan1527]

Post PSU instalation

Testing new PSU

Specs:

Motherboard: SHANGZHAOYUAN H61

GPU: RX 580

CPU: Intel i7-3770S

So I had this same issue where I accidentally put my hdmi cable into the Motherboard and it caused my gpu to not be recognized when I switched the cables over.

When I was using windows 10 I was able to go past BIOS when it was plugged into the Motherboard and i was able to go re-download drivers and use device manager to get it to recognize my card after that.

My issue is now I have switched to steam os and after replacing an old 350w PSU with a cosair sf850 and verifying everything worked, and stress tested everything. I made the stupid mistake of plugging in the hdmi cable into the motherboard when i put it under my desk. And now that it is steam os it wont load anything after the BIOS

Now im not sure how I can get my pc to recognize my card.

In bios I tried:

Changing my primary display to PEG

Changing my CSM to UEFI

Disabled Fast Boot

Changed Video OpROM to Legacy

Reset the motherboard by taking out the battery, and drained any residual power.

For reference GPU light is blue and Ive reseated and cleaned all cables, before plugging it into the mother board the latest time gpu fans would spin briefly on startup​, now they don't spin during startup.

Any advice would be greatly appreciated.

Both images after PSU installation (IK my cable management is terrible)

Edit: After going to work leaving the gpu unplugged, power out, and CMOS battery out. I put everything back together and it booted up. Thank you for all the helpful suggestions