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PC turns on for 1-2 seconds, off for 1-2 seconds and finally boots

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  • Motherboards
Last response: in Motherboards
March 27, 2014 12:13:18 PM

Hello! As you see the title, my pc turns on, off and on. Now, being a newcomer to installing motherboards, I did pretty good. Except, I put the floppy drive power cable on SYS_FAN 1. Yeah... The guys at the shop told me that could have ended awfully, that I am lucky it even works. Well, it does, but with the problem above.

So, my question: is it related to my installation fail? do I need drivers or something?

Thanks for all the help!

More about : turns seconds seconds finally boots

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a b V Motherboard
April 7, 2014 4:39:38 AM

Well, Im sure the problem is that your blew a mosfet or the VRM area on your motherboard by plugging in that floppy power connection to the 4 pin fan header. The SYS_FAN 1 is only able to give power to fans, once it shorts out, it could end the motherboards life or continue working or make things un usable like Ethernet or sound.

What you can try is, turn the system off, unplug the power from the back of the Computer, and open the side. Find the button cell battery (looks like a watch battery) and pop it out for 60sec (don't break the clips). Then pop it back into its slot the same way you took it out, you should see the + if you popped it in right. Plug the system in and see if it will boot with out restarting.

If you still have a problem, I bet its the motherboard that is ready to fail or the Powersupply.
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April 7, 2014 1:30:44 PM

Viking2121 said:
Well, Im sure the problem is that your blew a mosfet or the VRM area on your motherboard by plugging in that floppy power connection to the 4 pin fan header. The SYS_FAN 1 is only able to give power to fans, once it shorts out, it could end the motherboards life or continue working or make things un usable like Ethernet or sound.

What you can try is, turn the system off, unplug the power from the back of the Computer, and open the side. Find the button cell battery (looks like a watch battery) and pop it out for 60sec (don't break the clips). Then pop it back into its slot the same way you took it out, you should see the + if you popped it in right. Plug the system in and see if it will boot with out restarting.

If you still have a problem, I bet its the motherboard that is ready to fail or the Powersupply.


Huge thanks for the battery take out tip. It worked and I am really happy now :)  I always knew that clearing cmos would fix a lot of stuff, but I thought I already tried it... Apparently not!
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