Computer does not power on.

I have a computer that won't turn on.  Came into work after the weekend and it would not power on after being shut down on Friday.  I have bought a new power supply and have the same results.  Fans turn on but nothing happens when pushing the front panel on/off button.  I have reset CMOS battery and reset ram.  Same results.  I have reset all connectors.  What next?

Thank you

MrWeen
MrWeenAsked:
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Ryan_KemptCommented:
Very likely could be your RAM - if you have spare sticks of RAM try swapping 'em, or if you have multiple sticks try booting the computer with just one of the sticks in at a time - also tell me if you get a beep or not with all the RAM in and when you have all the RAM out of the computer.
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willcompCommented:
Do fans turn on without pressing power switch?
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willcompCommented:
Alos, do fans keep running or go off after a few seconds?
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MrWeenAuthor Commented:
Tried swapping RAM.  Same results.  There is no beeping with or without RAM.
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MrWeenAuthor Commented:
Once PS is plugged in I press the power button on front panel.  Fans come on after pressing button and do not turn off unless I hold down the front panel power button for about 5 seconds.  Then they will not turn back on unless I turn on and off the power switch on the PS and restart the process.
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willcompCommented:
I'd suspect a faulty capacitor on motherboard since you have already replaced power suppy.
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Ryan_KemptCommented:
It is very likely a motherboard problem (though I wish there were a more cost-effective solution for you).
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MrWeenAuthor Commented:
So the solution is to try another motherboard?  Is it possible that it has anything to do with the front panel button?
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Ryan_KemptCommented:
It's highly unlikely - especially since fans spin, the front panel button is doing it's job from what I've read. =\
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MrWeenAuthor Commented:
Well I'll buy a new MB today and install and let you know how it goes.  Thank you for the help so far.
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nobusCommented:
try first to boot with a minimum setup :
mobo + cpu + 1 ram stick, video card, PS  --> any display? if No, it is one of the connected, swap ram, video card
if Y --> connect devices till the problem appears
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