I have a couple of these PSUs that have the exact same issue on both of them. I find it odd that they both exhibit the same Symptoms.
When plugged into the PC, the PSUs are able to power the LEDs inside the motherboard (the standby 5v circuit I suppose?) But as soon as the power button is hit, the PSU powers on for a split second, then there is a (relay?) click and the PSU shuts off. Hitting power does nothing after unless the power is removed and then turned on again.
I have a PSU tester which has the same results. As soon as the tester plugs in, it powers on for a split second, and then there's the click and it's off. Turning off the power switch does nothing. If I remove and replug the 24(?)pin power cable though, it does do the click on and off.
I opened the PSU and looked inside, but cannot see any signs of failure.
I noted a relay: 307H-1AH-FC 12V=DC that I believe is making the clicks.
Any ideas of how to diagnose further?
When plugged into the PC, the PSUs are able to power the LEDs inside the motherboard (the standby 5v circuit I suppose?) But as soon as the power button is hit, the PSU powers on for a split second, then there is a (relay?) click and the PSU shuts off. Hitting power does nothing after unless the power is removed and then turned on again.
I have a PSU tester which has the same results. As soon as the tester plugs in, it powers on for a split second, and then there's the click and it's off. Turning off the power switch does nothing. If I remove and replug the 24(?)pin power cable though, it does do the click on and off.
I opened the PSU and looked inside, but cannot see any signs of failure.
I noted a relay: 307H-1AH-FC 12V=DC that I believe is making the clicks.
Any ideas of how to diagnose further?
Attached Files
. Checked main heatsink one by one with my component tester and found one 3 leg buddy MDP18N50 that passed away. Got same replacement after a week, tested, short was gone, now I got 310V on primary.
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