Gigabyte ga-h57m-usb3 shutoff problem

[willys59]

I have a Gigabyte ga-h57m-usb3 that I've been using since January. All in all this board has been great. A month ago I had a problem with it shutting off. I'd unplug the PSU and leave it for a little bit then it was ok. I was not hearing anything out of the fan so I figured it was dying. I bought the PSU from a local dealer when I built the machine in January. I replaced the PSU 2 or 3 weeks ago and this past week it started again. With no warning it will just shutdown. I have to pull the p/c and let it sit anywhere from 15-30 minutes before it will come back up. I can jump start both the new PSU and the old one and both turn on. When the MB does boot I get a CMOS checksum error. When it comes back up the time is the same time as when it shutdown but the the date is correct. I've turned it off and let it sit for an hour before turning it back on and everything is ok.

I need help! Do I replace the PSU again or go for the MB. The PSU is either 400-430W. I have a a Geforce GTS450 video card with a power connector. I'm running two SATA HDD and an IDE cdrom. I've been running a Happ WinTV 1600 tuner card but have pulled it out for testing. I'm not overclocking and have reloaded CMOS defaults. The problem seems to be worsening. I don't know what to do.

Anybody got an idea! Please!
Thanks!

 

[BoomerD]

Identify the power supply please.

 

[VirtualLarry]

CMOS battery problems?

 

[stargazr]

When it comes back up the time is the same time as when it shutdown

+1 for new CMOS battery

 

[willys59]

Power supply is a Logisys ps48002. This was what my local dealer had. The original power supply was a iMicro ps-im400wh. As far as the cmos battery goes even though when shutdown normally it holds the date and time you guys would still recommend replacing that correct? Thanks for the help. This is driving me crazy. The run times have begun to get shorter.

 

[stargazr]

Problems with time and CMOS defaults point to the battery, both rely on battery power when machine is shut down.

Also the PSU has been replaced with a different brand; unlikely that you would get another bad one (though not impossible).

 

[willys59]

Ok. Did an old school cmos clear this morning or last night. Not really sure. Cleared date/time/etc. Machine was running this morning when I left for work. check periodically during the day remotely and was still running. Turned the unit off and reinstalled TV card. Unit ran until just after 7:15pm. Wouldn't turn on. Pulled power and still nothing. Had another battery that I tested and was good. Installed and still nothing. Left and came back and of course it boots. Ran for a little bit and noticed the cpu fan was loose. Temps were a little high so go ready to take down and died. Correctly attached cpu fan, took about 15min. Unit came back on. CPU temps were even lower now. CPU fan was loose after working on it the other day to resolve this problem. Unit ran for a little over eight minutes. Temps were steadily going down. Shut off. Can't to boot. Dbl checked power supply by disconnecting adn jump starting it.

Am I missing something? I've toyed with the idea of rigging up the jump start technique on the connector since I have a switch on the back. I just don't want to take the board out permanently but at this point it almost might as well be. I'm not sure the warranty period on the board (Gigabyte purchased through Amazon). I did pull both cards out and disconnect my hdd. Still won't turn on. The date issue doesn't bother me as bad as the not turning on.

Any insight is appreciated.

 

[willys59]

Ok little update. After a lot of searching I found some interesting information about this board. Seems as though there's been problems with the Northbridge Chipset. I improvised a fan to blow on it and it has been working great. Now to see if I can get something done about the MB.