I recently assembled a new PC build outside of the case to check if everything was functioning properly, but it won't switch on at all. The power supply unit (PSU) doesn't seem to turn on, there are no LEDs on the motherboard, and both the power button and the reset button are unresponsive. The only sign of power I get is when I press the Q-flash button on the back of the motherboard, which lights up the CPU LED on the motherboard solidly.
I did my homework before the build and flashed the latest BIOS for my motherboard before installing any parts, because I heard that it doesn't support 8000-series Ryzen CPUs right out of the box. I flashed it just with the PSU connected and the Q-flash LED blinked for about 5 minutes before shutting down, so I think it did flash correctly.
After that, I installed the CPU, cooler, and RAM, connected the case's power switch, and nothing happened when I tried to power it on. I also swapped the power switch connector just in case I wired it wrong, but still no success. I questioned whether the BIOS flashed correctly, so I reattached the USB drive and tried again, but the Q-flash LED stayed on solid this time, and the CPU light was still lit while the other troubleshooting LEDs were off.
I even removed and reseated the CPU and cooler, cleaning and reapplying thermal paste, but the same issue continues. Given these symptoms, I'm starting to think my CPU might be dead. I've never encountered a new CPU that was faulty before, so I wanted to see if anyone has any other ideas before I request a replacement.
2 Answers
Have you made sure the RAM is installed in the second and fourth slots? It's important for the motherboard. Also, double-check both CPU power cables are plugged in at the top left of the motherboard. If you're still having issues, try booting with just one RAM stick at a time in the second slot to rule out bad RAM. Lastly, inspect the CPU socket for any bent pins; that could also cause trouble!
Just a heads-up, the reset button usually won't work to turn on the PC from a complete shutdown. If you're having trouble with the case power button, try using a screwdriver to short the power button connectors on the motherboard directly. That could help determine if the case button is faulty!
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