psu troubles

[Soapy5]

guys, i need some help...
im not sure if this is a psu or a mobo problem, so im posting this in both forums. anybody have any idea what the problem is?

first off, what happened as far as i can remember:

equipment:
psu: forton 550 watt fsp550-60pln (24 pin)
mobo: gigabyte ga-k8n ultra 9 (24 pin)

backup equipment

old mobo that came with my hp (20 pin)
crappy 450 watt psu that came with my case (20 pin)
(link to image)

a spare 12v fan, and 5v led light


i was on my comp, and i noticed the weather getting pretty bad (aka thunderstorm). so i play it safe, turn off my computer and disconnect my surge protector from the wall. the next day, my computer wont turn on. wtf? i check everything, and the only thing that was connected to the wall was my ethernet cable. there were no burn marks or funny smells emanating from the cable or jack, so i figured that wasnt the problem. i open up my case, and reseat everything. still no power up. getting a bit flustered, i take out my psu, hook up a 12 volt fan and a 5-vold led light, and short the green and ground to make it start. the fan runs, and the led light shines. everything a ok. i hook it up to my mobo again, but nothing happenes when i hit the power button. i make sure the powerbutton wiring is ok, and try again. getting a bit desperate, i shove a paper clip to the back of 24 pin connector's green and ground to try and start it. still nothing happens. i disconnect just the mobo and the vid card, leaving the hdd, fans, and cd drive. i short the same wires, and everything whirrs to life. next, i remove the psu, and hook it up to my 20 pin test mobo. i hit the powerbutton. i hear fans coming to life and the mobo beeping. wtf. now im convinced that my mobo is fried. i hook up a backup 20-pin psu to my mobo, and hit the powerbutton. expecting nothing, im pretty surprised to see my comp posting and loading the os. wtf.

so to recap:

24pin psu + 24 mobo=
24 pin psu by itself plus some fans/led/hard drives=
24 pin psu + 20 pin mobo =
20 pin psu + 24 pin mobo=
me =

now, anybody have any idea what the problem might be? cause im currently running my computer with the backup psu and im expecting it to 'explode any minute now...

 

[Soapy5]

forgot to mentions something: when the forton psu was hooked up, it seem to apparently 'pulse' electricity through. Basically, my mouse has led scroll light that usually is always on, even when the computer is shut down, and when it was hooked up to the psu, the led was flickering. i dunno if this helps, but im going to guess that my psu iis botched (although i have no idea why it would still work on a 20-pin mobo)

 

[Teknokid]

have you tried just 20pins of your main psu?

 

[andyOCZ]

I think you have 3 choices:

1) Buy a 24 pin PSU tester (they are pretty cheap) and see iff allof te lines are working on your PSU.

2) Jump start your PSU and use a DVM to check your voltages on the various lines.

3)Buy a replacement PSU (locally is best, as you can return it) and see if that fixes the problem.


If the above doesn't help, RMA your motherboard.

 

[Soapy5]

i dont really know of a viable way to fit just 20 pins of the psu on the mobo (well, anything short of hooking twenty wires from the mobo to the psu or buying an adapter...)

however, there is a fry's nearby, so i might buy a test psu if they have a return policy...

 

[Soapy5]

ok, i bought a decent 24 pin psu (antec earthwatts 500w) and everything worked as expected. so im deducting that its my old psu thats busted. so, does anybody know if there is a page where to find what amperages one can expect from each of hte mobo connector's pins? or do they vary greatly from mobo to mobo. while on the topic, anybody know where i can find a graphic for voltages? cause i got my trusty multimeter, and didnt really find good results on a google search...


edit: i found jonnyguro's site, and that had some nice pics. so i i tested my psu out, and everything looked fine. also, i took out the paperclip and tested the 5v standby line, and that was good too. is there something im missing?


edit:

just to be sure, here are the voltages i got:

3.3v: 3.39
5 v: 5.07
12 v: 12.25
5v standby
off: 5.13
on: 5.13
power good:
off: 0
on: 5.07
power on:
5.11

-5v: -4.98
-12v: -12.06


there where no visible fluctuations