[SOLVED] My mobo won't turn on & stay on unless I bridge pins from paper clip test

[dan_729]

The PC shuts down immediately as soon as I remove the clip (clip connected at the back side of the cable, which is connected to mobo). What's weird is that this happens intermittently, sometimes I can power on normally, sometimes I need to bridge those pins to power on and keep the system from shutting down.

Mobo is Asus TUF B550-Plus running on Agesa 1.2.0.7 (latest BIOS). PSU is Corsair RMi 1000W.

 

[Lutfij]

clip connected at the back side of the cable, which is connected to mobo
Clip? Are you referring to a cable tie? If your connector to the 24pin main connector on the motherboard is not secure, you can and will see anomalies. My question is why are you tinkering with the power cables on the board when it's powered...? Again, that's what I'm getting from your thread's body/stylization. If I've got it wrong, please elaborate.

Mobo is Asus TUF B550-Plus running on Agesa 1.2.0.7 (latest BIOS)
BIOS version 2803? That's a Beta BIOS so expect some glitches to be around until a latter BIOS update comes around.

 

[dudio]

It sounds to me like either your psu is failing, or you have some other system fault that is causing the psu to shut down. If you are using the clip to force the psu to remain on, you are putting the entire system in jeopardy, not to mention a fire hazard.
Start by sourcing a spare GOOD quality psu to see if your psu is done

 

[dan_729]

clip connected at the back side of the cable, which is connected to mobo
Clip? Are you referring to a cable tie? If your connector to the 24pin main connector on the motherboard is not secure, you can and will see anomalies. My question is why are you tinkering with the power cables on the board when it's powered...? Again, that's what I'm getting from your thread's body/stylization. If I've got it wrong, please elaborate.

Mobo is Asus TUF B550-Plus running on Agesa 1.2.0.7 (latest BIOS)
BIOS version 2803? That's a Beta BIOS so expect some glitches to be around until a latter BIOS update comes around.

Thanks for the help, I just identified the issue. It was the ATX cable indeed. The pin sockets which tells the PSU to turn on became lose from the PSU power on tests I did, which prevented them from properly gripping onto the Mobo pins. The reason sometimes everything seems to boot normally is because the ATX cable became disturbed by chance in a way which made those pins actually make contact.