PC fails to start upon booting
PC fails to start upon booting
Hello, I’m reaching out for some assistance as my troubles are piling up. I’ve shared my PC details below. Everything functioned smoothly yesterday until I installed a Commander Pro. I have six fans connected to the Commander Pro, plus a USB from my AIO pump and another from my Lightning Node Core. I also used a daisychain to link the Commander Pro to the PSU, but it only had an AIO attached, which made me assume everything would work.
Once I started it, it booted into BIOS and reset itself. I changed just the XMP profile and restarted several times. At one point, the PSU emitted a faint shutdown sound—like it intentionally powered down—but then it restarted. It ran for about five minutes before restarting again. Since then, I can’t get past POST. I can turn it on, but all fans spin, the GPU fans do too, and the RGB lights stay active.
However, when launching it, I can’t use the case buttons to reset or shut it down. Only the back-side PSU button works. This sounds like a sudden power surge or a dead motherboard issue?
PC specs: AMD Ryzen 9 5900X (new, purchased last week), MSI RTX 3070 Corsair Vengeance Pro RGB 3600mhz, 32GB (4x8), Gigabyte Aorus x570 Elite (BIOS vF32), Corsair TX750M Gold PSU, Corsair iCUE H100i RGB PRO XT, AIO x6 Corsair case fans (three types, no problems before), iCUE Lightning Node Core Commander Pro x2, Acer monitors using DisplayPort, Windows 10 64-bit.
I’ve tried: Resetting CMOS (via battery removal and pin shorting), tested RAM one by one, ran system without drives/ram, rechecked cables and screws, unplugged peripherals before launch, swapped CPU to Ryzen 7 3700X but still failed, considered using old CPU or another GPU, but doubt it’s a GPU problem since it worked fine until XMP changed.
Any suggestions? Thanks!
Undo the XMP adjustments and reinstall the AIO onto the motherboard. Verify the power-on sequence: the PSU should perform its self-test, start the fan, and then shut down. If the fan only attempts to spin during boot without completing, it may indicate a PSU fault—consider using the paper clip test. When connected to the board, a faulty PSU usually shows only slight movement that isn’t a full spin-up.
I can't get into the BIOS normally, otherwise I'd attempt to run it without XMP settings. I undid all the modifications and reconnected everything as before, but nothing changed. My AIO remains linked to CPU_FAN, while the iCUE software is now connected to Commander Pro. Regarding the power supply, I'm currently replacing it with beQuiet Dark Power 10 to test if it passes the POST process. If that fails, I'll follow your suggestion about checking the fan. What worries me most and leads me to suspect a motherboard issue is that after launching, I can no longer use the power and reset buttons.