computer won't power up

[Madison Kelly]

Lennart Sorensen wrote:
> On Thu, Jan 22, 2009 at 03:41:30PM -0500, Madison Kelly wrote:
>> Unplug everything from the PSU except say an optical drive (or an old 
>> hard drive you don't care about). This is because the PSU needs a load. 
>> Next, find pin 13 on the main header; This is usually the sole green 
>> wire, often a smaller gage then the rest. Short this to ground. Now flip 
>> the switch on the back of the PSU to connect the mains and see if it 
>> powers up. If it does, your problem is not the PSU. If it doesn't, the 
>> PSU is dead.
>>
>> Pin 13 is the Power Good Line, this is normally shorted to ground by the 
>> system board/CPU when the initial ripple in line voltage has settled to 
>> protect the rest of the devices from damage. Hence why you don't want 
>> anything sensitive plugged in while doing this test.
> 
> Pin 13 is ground.  Pin 14 is PS-ON.  Shorting PS-ON to ground makes an
> ATX power supply turn on.  If it is not shorted to ground it turns off.
> 
> So shorting pin 13 to 14 should make it be on.
> 
> Power-OK is pin 8.  Don't mess with that.

Dammit, I knew I shouldn't have posted this while being so tired. Sorry 
Daniel.

Madi
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