PC power problems

[chris_super1]

Could do with some help.

Have a few years old HTPC that i haven't used in ages as it wasn't powering up. Haven't had chance to look at it until today.....

Its a Asus P5N7A motherboard, small HDD, blue ray drive. Nothing special.

Anyways. The green LED was flashing on the motherboard so i thought it was a PSU problem. Did the paperclip test and it seemed fine. Then after a bit of messing and reconnecting the PSU it fired up just fine.

Just been playing and it starts up and restarts fine, but then i powered it down and then it wouldn't power back up. Green flashing light again on the motherboard.

Reseated everything and paperclip test again and back up and running. But shut down again and back to the flashing LED.

Any ideas what's causing it?

Cheers

 

[tres_kun]

test a working psu with the system
As the paperclip test only powers it on
the motherboard checks if the psu can sustain voltage with a load

 

[ED209]

Could always try a new PSU kettle lead?

having a quick look online a green flashing LED on your mobo indicates a fault in the 5v standby power bus on the PSU.

Do you have many USB devices connected to the PC like HDDs etc or is it just the keyboard and mouse?

Do you have another PSU you could try?