Computer turning on and off and looping (using TX750W)

[susuchai]

Hi,

I recently encountered a problem with the computer. After turning my computer on, it goes on for 2 seconds and then it turns off, and then it automatically turns on and reloops. I don't know if it's caused by the motherboard because there are debugging-LEDS on my motherboard that indicates where the problem area is. When I turn on my computer, the LED representing overvoltage at the southbridge goes on. I'm just wondering if this is a problem caused by a faulty power supply or a faulty motherboard. Please give me some advice. Thank you.

[Synthohol]

http://hardforum.com/showpost.php?p=1034390752&postcount=11

 

not your exact MB but similar enough issue.

 

you can try resetting the bios.

[susuchai]

http://hardforum.com/showpost.php?p=1034390752&postcount=11

 

not your exact MB but similar enough issue.

 

you can try resetting the bios.

 

Hi,

true that I have the similar problem, but I also ain't able to go to the post screen. Anyhow, it's either the PSU or the MB, which I believe most likely is the MB's fault. I'll try asking for an RMA for my PSU and the MB and see if that works.

 

Thanks anyway.

[Synthohol]

if you have access to a volt meter i would check all the pins on the 24 pin connector and look for any out of spec readings before RMA.

if every 12, 5 or 3.3v reading is within 5% of spec its very likely its the motherboard.

also i personally would take the board out of the case and bench test it there to eliminate a case short as a cause.

 

g/l

[susuchai]

if you have access to a volt meter i would check all the pins on the 24 pin connector and look for any out of spec readings before RMA.

if every 12, 5 or 3.3v reading is within 5% of spec its very likely its the motherboard.

also i personally would take the board out of the case and bench test it there to eliminate a case short as a cause.

 

g/l

 

Is there a way to test if it's the PSU fault without replacing it nor using a volt meter? Because I asked a few of my friends and they're not really willing to remove their PSUs from their comps (too much a hassle).

[Synthohol]

a volt meter is the ONLY proper way of diagnosing a PSU problem, there is no other way.

[RAM GUY]

Hard to say for sure if its the PSU, the motherboard, or if there is a short being detected by the PSU. Other than using the volt meter to test for proper voltages, you can test the PSU in a different system, but other than that there is not much else that you can do to narrow it down. If all else fails and you would like to try a replacement then please Request an RMA.