The PC isn't starting to POST until you switch the power supply off and then back on. It might be the motherboard.
The PC isn't starting to POST until you switch the power supply off and then back on. It might be the motherboard.
I’m facing a persistent issue with my PC. To start, I need to turn off the power supply unit first; then it boots normally. If I shut down through Windows, wait under ten seconds, press the power button, and the PSU powers on and off instantly, causing a brief startup but no POST before shutting down. Pressing the power button repeatedly triggers this loop, occasionally getting a successful boot if timed correctly. Cleaning and checking cables, reseating components, updating BIOS, and inspecting grounds haven’t resolved it. I suspect a motherboard fault, possibly due to thermal paste contamination during testing on another system. After reinstalling the CPU, it failed to power up at all. Recently, I cleaned the socket thoroughly with isopropyl alcohol, cotton swabs, and a soft brush, and it worked for about two days before the problem returned. I’m confident the issue lies with my motherboard. Any advice or assistance would be greatly appreciated.
I use that board in my son's system, though I ran it for about a year and a half before handing it over. Is the memory listed on the QVL? It’s simple to verify—Asus has one on their B550-F page, and G.Skill provides a guide for your specific RAM. I looked at both QVL entries before buying, and to be honest, up until this point, it was the most dependable machine I ever assembled. I even checked the QVL for my M.2 modules for the first time ever. For the first time, I can confirm that my B550-F doesn’t handle the Adatas I installed well. The cheapest RAM I found locally turned out to be poor quality; some might say the QVL isn’t crucial, but if you’ve ever built a frustration box, it could make a difference.
They are Trident Z Neo units, currently on the QVL boards. They've been running since I acquired the board. I'm fairly sure the memory isn't the cause because I ran extensive tests. I lowered clock speeds back to the standard level and disabled all but one. Then I checked every slot to confirm a clean boot, and finally tried it with another stick to verify it worked.