Board won't power on IF atx 12v is plugged

I was trying to switch cpu fans. The pc booted and froze during POST. The pc wouldn't turn on afterwards.
MS-6777
The current situation is:
No device connected to the mobo, not even CPU.
I took the mobo out the pc-case to avoid any shortages.
I can manage to turn it on WITHOUT atx 12v. If I plug ATX 12V computer won't turn on, fans move a little bit but stop.
thanks for your time.

for other helpers sake, please use the 'marketing name' of your board instead of the MS-xxxx number to identify your board
in your case, MS-6777 is the 'K7N2GM-L'
Is your problem caused by your PSU?
Clear CMOS Guide
Make sure your heatsink is rated for your CPU, and is seated correctly:
and in order to POST correctly, your mobo needs at least a CPU and one stick of memory...

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What brand/model of RAM do you use?
What kind of video card do you have installed (brand/model)?
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O.k., blown power supply, I think . . . .
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Hmm . . .
I come here, and I read posts about
potential compatibility issues with Antec power supplies. But if it's a compatibility
issue why was my system working for about a year?
O.k., fine. I'll buy a Enermax 535W EG565P-VE FMA 24P (115/230 VAC) power supply.
I just plug it into the mainboard (nothing else). Hit the power button . . .
The CPU fan spins for half a second, and then nothing.
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Pull the AC plug from PSU and set cmos in clear position with battery removed for atlest 20 minutes perhaps longer .
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Hey Shim..,
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OK but a transistor is a long way from a microprocessor. Uhh where did he get his...oh never mind.
I have read in some forums about the leaking super cap,
I'd be interested in those leads
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Just put one up here, it's from a 12" G4 1.2 GHz:
http://www.photolava.com/view/d5pr.html
They're pretty distinctive, so hard to miss.
Here's the blowed up one from the 500MHz 12" G3
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Well let's determine if it's bad first. Usually when these things fail it's pretty obvious.
I'd try blowing out all the chips we talked about first since I believe a tiny bit of smutz will cause a CMOS micro to crash.
It reminds me of when these early PMUs will crash and drag the battery down with it in a matter of days vs years.
One of the resets in those was to remove all power and let it sit just like you're doing here. This was called resetting the logic board and was SOP for a no startup situation.
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m-one
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Message was edited by: MTCca

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Board won't power on IF atx 12v is plugged

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