mobo problem??

[gb1217]

I just completed building my computer... i connected it to the power supply.. when i switched the power button...nothing happened...i just heard a sound and my mobo fan, cpu fan rotated for about few seconds and then stopped!.. i tries changing the psu to no good..i even removed all my stuff except mobo, ram, video card and tried starting..it dint work..i tried shorting the power switch from the case...it still dint work!...please help: i dunno what wrong??..is it something with the mobo??

 

[avey]

Sounds like something is shorted. Strip it down to bare minimum. Only Mobo, cpu, cpu fan, video and ram. Unplug any extra usb headers you may have pluged in as well as all your front pannel connectors except the power switch. unplug the power cable from the power supply for a few seconds. then plug it back in and try again.

Other reasons that come to mind.
make sure the psu is set to 110. Ive actualy had new ones shipped to me set to 220.
make sure the 4 pin 12v power connection is connected. If your mobo uses it.
make sure your heat sync is seated correctly

 

[gb1217]

i tried that as well.. it still doesnot work!...any other suggestions

 

[Smilin]

unplug the power connector from the mobo, use a paperclip to short the green pin to any black (ground) one. The PSU should come on. If not, bad PSU.

If PSU looks good, take out everything including memory, video card. Unplug all drives. You should only have a CPU+heatsink+motherboard hooked up to your case and power supply. use the BIOS reset jumper, try again powering up again. You should at least get the no-video/no-memory beep codes coming from your case speaker.

If still no good, double check your case to mobo connectors. That's got to be the single most difficult part of building a PC

If still no good - yeah fried CPU or Mobo.

 

[avey]

On your first boot you said "when i switched the power button...nothing happened...i just heard a sound and my mobo fan, cpu fan rotated for about few seconds and then stopped"

Is it still doing the same thing now? Or when you hit the power button your get nothing now?

 

[gb1217]

it still turns for a couple of seconds and then stops

 

[gb1217]

hey smilin....i tried whatever u said..still no luck...also i hear this "snick" sound n the fans rotate for a couple of seconds n then it stops!....i tried all..oh man..any other suggestions

 

[gb1217]

actually i did not even have to turn my power button on...when i turn the psu power switch in the back...the mobo fan n the cpu fan rotates n thn stops..

 

[gb1217]

can someone please help!!..i tried everything..i even changed my psu to a higher watt(430) and higher current(26 A)..it still doesnot work.....could it be my cpu or mobo thats got problems??..how could i check them??