PC fails to start, EZ DEBUG remains locked on CPU indicator
PC fails to start, EZ DEBUG remains locked on CPU indicator
You recently sold a functional PC and now someone is reporting it’s malfunctioning. From the photos you shared, fans are spinning, RGB LEDs are active, but there’s no visible error screen. The EZ DEBUG LED on the CPU is illuminated. Your system specs include a Ryzen 3 1200, MSI A320M Pro VD, 1x16GB DDR4, RX 570, and Corsair VS450. You ran benchmarks and stress tests before handing it over. You asked for a BIOS reset, re-seated RAM, and checked the power connector, but nothing works. What might be causing this issue?
Start by removing the cooler and taking out the CPU. Make sure there are no bent pins and reinstall it before putting the cooler back on. Consider reapplying thermal paste if needed. If that fails, check for any loose connections or shorts in the gaps between the board and chassis. A full rebuild on a simple surface like a kitchen table can often resolve the issue. If neither of these approaches works, try booting with minimal hardware—just motherboard, CPU, GPU, and one RAM stick. If that doesn’t help, it might be time to seek further assistance.
I've received some updates. The PC came back on Monday. I brought it home, connected it to my TV, and everything functioned properly. The day after returning it, I conducted tests and recorded videos to demonstrate its operation. When the buyer picked it up again, the PC started working that same day, but he couldn't power it on the following day. For me, this is unusual. After plugging it in, the BIOS would reset itself after a couple of restarts, and Windows booted fine each time. This suggests the buyer was unable to reset the BIOS. Initially, I suspected an error from him, but now I believe the issue stems from the power outlet—possibly insufficient voltage or another problem. I kept the computer on for two days, turning it on and off around 20 times without any issues. What are your thoughts? I think the PSU still had residual charge when I returned it, which allowed it to start, but the next morning the motherboard didn't boot at all.