F5F Stay Refreshed Hardware Desktop System fails to restart upon power loss and requires a PSU reset.

System fails to restart upon power loss and requires a PSU reset.

System fails to restart upon power loss and requires a PSU reset.

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Ender_Craft47
Posting Freak
866
06-12-2022, 05:04 PM
#1
Hey everyone, I’m dealing with a gaming PC that’s been around for a while. It’s a bit like the Ship of Theseus—parts have changed over time. Right now it has a 7900X CPU, an RTX 3080 GPU, Corsair 4000D, ASUS PRIME X670E with WiFi and M.2/SATA drives. I run both Linux and Windows, and everything worked fine until recently. There’s a problem: after turning it off for about five seconds, I can’t power it back on. If I switch the PSU off, hold the power button briefly, and then turn it back on, I get 3-4 seconds before it fails again. I’ve tried a new PSU, disassembled most components, and done some minimal boot tests, but I’m still stuck. Any advice would be greatly appreciated!
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Ender_Craft47
06-12-2022, 05:04 PM #1

Hey everyone, I’m dealing with a gaming PC that’s been around for a while. It’s a bit like the Ship of Theseus—parts have changed over time. Right now it has a 7900X CPU, an RTX 3080 GPU, Corsair 4000D, ASUS PRIME X670E with WiFi and M.2/SATA drives. I run both Linux and Windows, and everything worked fine until recently. There’s a problem: after turning it off for about five seconds, I can’t power it back on. If I switch the PSU off, hold the power button briefly, and then turn it back on, I get 3-4 seconds before it fails again. I’ve tried a new PSU, disassembled most components, and done some minimal boot tests, but I’m still stuck. Any advice would be greatly appreciated!

4
476ms
Member
203
06-13-2022, 12:59 AM
#2
This seems unusual. My main theory points to a BIOS/firmware issue. Consider flashing the BIOS again if it doesn't resolve the problem. It's possible the BIOS or its revision for your motherboard is faulty. Also, check if the NVRAM is damaged—removing the CMOS battery and letting it discharge fully before reinserting it could help. Give it some time, around five minutes or more, so the charge dissipates completely. Also, test the power button by shorting the pins on the motherboard; if it works, the PSU might be misreading the switch state. It could be stuck halfway and confusing the system.
4
476ms
06-13-2022, 12:59 AM #2

This seems unusual. My main theory points to a BIOS/firmware issue. Consider flashing the BIOS again if it doesn't resolve the problem. It's possible the BIOS or its revision for your motherboard is faulty. Also, check if the NVRAM is damaged—removing the CMOS battery and letting it discharge fully before reinserting it could help. Give it some time, around five minutes or more, so the charge dissipates completely. Also, test the power button by shorting the pins on the motherboard; if it works, the PSU might be misreading the switch state. It could be stuck halfway and confusing the system.

I
iPhan
Member
183
06-13-2022, 03:47 PM
#3
It seems the problem isn't a typical PSU failure but rather an odd power state issue. Try these steps: reset the CMOS and confirm you have the most recent BIOS for the X670E. Some AGESA versions may affect power behavior unexpectedly. Verify your ErP settings—specifically “Power On After AC Loss” can cause strange behavior during power cycles. Fully discharge the PSU by turning it off and holding the power button for 20–30 seconds before retrying. If this resolves the issue, it suggests a board or BIOS problem rather than a faulty power supply. Also consider checking the front panel power switch connector for a loose connection. If none of these help, it might be related to the board’s power delivery system on AM5 MSI/ASUS models, which have had similar reports.
I
iPhan
06-13-2022, 03:47 PM #3

It seems the problem isn't a typical PSU failure but rather an odd power state issue. Try these steps: reset the CMOS and confirm you have the most recent BIOS for the X670E. Some AGESA versions may affect power behavior unexpectedly. Verify your ErP settings—specifically “Power On After AC Loss” can cause strange behavior during power cycles. Fully discharge the PSU by turning it off and holding the power button for 20–30 seconds before retrying. If this resolves the issue, it suggests a board or BIOS problem rather than a faulty power supply. Also consider checking the front panel power switch connector for a loose connection. If none of these help, it might be related to the board’s power delivery system on AM5 MSI/ASUS models, which have had similar reports.