Motherboard light on, passed paper clip test, but won't power on

[mardanlin]

I tried using a screw driver to connect the two pins that the power button runs do, but nothing happened. The system was fine when I turned it off about a year ago. I took the hard drive out to use as a back up in my new build but when I tried booting my old build (the pc in question) it failed to start.

I tried reseating the power button connector, no go. Then I tried the paper clip test and the fans powered up. I then tried a screw driver to the two power button pins but nothing happened.

I looked through the manual but couldn't find a manual power switch anywhere.

The mobo is an Asus M2N4 SLI. The PSU is a ln OKIA 600ATX.

I hope the mobo isn't fried and don't see how it could be because it functioned fine the last time it was powered down. 🙁

 

[Milheim]

Try another PSU if you have one lying around. I'm actually repairing/upgrading a friend's PC who had the same exact symptoms. His motherboard was toast, and the new motherboard fired up the first time. However, subsequent starts after that it would not power on. Fans spun for a split second and everything went off again. No big deal because I was upgrading his PSU as well and was just testing with the old one. Now everything comes on the first time, every time, with the new PSU.

 

[mardanlin]

I only have a 400w PSU, would it work? Can't find the power requirements in the manual either.

 

[Milheim]

Assuming it has the proper connections, yes. That'll mostly depend on the graphics card and how much power it draws.

 

[alexoiu]

Try replacing the CMOS battery with a new one. Try also disconnecting the 4 pin power cable from the motherboard, leaving case fans connected and starting the board. See if the case fans do spin.

 

[mardanlin]

The 400w PSU powered it on. Does that mean the old one is toast and no chance of getting it to work?

Also, if the 450w isn't enough for the GPU (512MB) and RAM (4GB) does it run the risk of messing up my hardware at all? If not I'll just run the 400w because this is a temporary use pc anyway. Thanks.

 

[Milheim]

The 400w PSU powered it on. Does that mean the old one is toast and no chance of getting it to work?

Also, if the 450w isn't enough for the GPU (512MB) and RAM (4GB) does it run the risk of messing up my hardware at all? If not I'll just run the 400w because this is a temporary use pc anyway. Thanks.

I would rather spend the money on a new PSU than on damaged hardware components. What CPU and GPU do you have, specifically? Those will draw the most power in your system. 400-450W may be plenty for an older motherboard like that...

 

[mardanlin]

I'm not exactly sure, it says D33006 GIGABYTE on the side but can't boot to get other information.

 

[Milheim]

You should be able to run the 400W PSU that works long enough to get into your OS and determine what hardware you have. After that you should be able to research the power requirements and make a better determination as to whether or not that 400W will suffice for now or you need to buy a new PSU.

 

[mardanlin]

I found the specific model it's a GV-NX76G512P-RH but I can't find anything about what PSU it requires. 🙁

 

[Milheim]

Power consumption appears to be only 32W, so I'd say you have more than enough: http://www.xgcdb.com/cards/gigabyte/gv-nx76g512p-rh.html