The power supply won't activate following the replacement of the motherboard.
The power supply won't activate following the replacement of the motherboard.
I recently needed to buy a fresh MSI B660M-A WiFi DDR4 unit, the same one I used before. The CPU socket had two missing pins, which prevented booting, but my PSU activated the LED indicators and the fan started running. After installing the new board, I reconnected everything carefully, took photos of the old setup, and added a Corsair liquid cooler. I also verified all PSU cables were secure. It seems the issue might have been a completely faulty motherboard.
Check if the GPU is connected and verify the RAM slots are correct. The power cables for the GPU should allow the system to start, while incorrect slots might block XMP support. I’ll run a paper clip test to confirm the PSU was still operational during the board replacement—it would be unfortunate but doable. For guidance, here’s a link from Silverstone: PSU-Paper Clip-EN.pdf. If this succeeds, it suggests the board isn’t trying to power up and is likely dead; otherwise, the PSU needs replacing.