My husband recently upgraded to an AM4 platform.
His issue is that there is no display. The gpu fans look like they are trying to start, but cannot. Additionally, there is no POST sound and the power button, while able to turn on the pc, will not turn it off. The lights on the motherboard work, as do the cpu fans and case fans.
I told him i think its a short, but he says the case has preinstalled standoffs. My other suspicion is a bad PCI-E port. It is a used motherboard.
Specs:
Processor: Ryzen 1700
Motherboard: B350M Gaming Pro MSI
RAM: DDR4 XPG Adata
GPU: GTX 1060 6gb
Also tried: Radeon R7 250
Thanks in advanced!
Edit: Oh wow so many posts! I'll try various solutions and keep you all updated on what work.
They're on the right side of the mobo next to the RAM slot, above the ATX power supply connector.
If the diagnostic LEDs aren't OK... check that the power supply cable (Big 24-pin, middle right edge) is fully seated.
Check that CPU power is connected (8-pin, top right)
Check for extra standoffs.
Try different output connectors on the GPU.
My Nvidia card displays the POST/BIOS on the rightmost used output connector, but I can't remember what my 10xx did. I think it was DVI, HDMI, then DP.
Anyway, might wanna use a single monitor until you figure this out and make sure it uses that input, had a weird monitor the outre day that would default to some random input even if it was unplugged.