My PC has suddenly stopped posting while it was idling, and I'm at my wit's end here. The DRAM and CPU lights are lit up, but the power button seems stuck; it can only turn on, not off. Everything powers on—the fans and lights are working—but there's nothing on the monitor. I've tried a ton of troubleshooting steps, including letting it sit unplugged for a week, reseating the RAM, testing each RAM stick in different slots, using a new RAM stick, shorting the CMOS pins, and even swapping the motherboard for a new one. I've done a minimal boot with just the CPU, fans, and one stick of RAM, replaced the CPU with a new one, flashed the latest BIOS (which I think failed), backed out the CPU cooler screws a bit, and checked for bent pins. My specs are Ryzen 5 7600, MSI Gaming Trio RX 6800, and a Thermaltake 750W PSU, among others. Any advice?
2 Answers
Have you tried connecting your display to the motherboard instead of the GPU? Sometimes it can help isolate where the issue is.
It sounds like you really need a set of good components to test. It can be tricky diagnosing the problem without them since you might just be replacing faulty parts. A faulty PSU could cause new components to act up too.
I agree—it's hard when I don't know anyone with spare parts. I’m planning to buy a new PSU and see if that resolves the issue.

Yes, I already tested that using the iGPU during a minimal boot.