IBM x3400 Power Issue

Hi fellow gurus',

I need your opinions.

I have a server (IBM x3400 - 7973-52M) that now requires me to keep the on/off button pressed and held pressed to stay on. If I just press and release (as it is meant), it attempts to start and just turns off again. To then start it again, you have to remove the power cable completely until all residual power is drained from the PSU, then press and hold.

I have replaced the on/off switch assembly with a new one - same problem.
I have replaced the PSU (non-Hot Plug) with a refurbished unit - same problem.
I have flashed to latest BIOS - same problem

I am thinking; Is it the refurbished PSU that is questionable or is it the system board that is faulty?

Am I missing something?

Cheers all,
Chris
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Chris RipollMaster of NoneAsked:
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ComputerTechieConnect With a Mentor Commented:
i would check the the powersuppy with a ohm meter to ensure it is good.
i would also check your old one.
if both are testing good than it could be mainboard.
On other thing you can do is disconnect everything but video and see if it happens again.
Sometimes a bad keyboard or mouse can cause this effect.

CT
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Chris RipollMaster of NoneAuthor Commented:
Power supply was OK and KB & mouse are USB so it must me systemboard... not what I wanted but thems the breaks.
Many thanks CT..
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