Computer Hope

Hardware => Hardware => Topic started by: teddygrams on April 21, 2010, 06:19:10 PM

Title: Motherboard powers on for 1 -2 secs then powers off continuous loop no post beep
Post by: teddygrams on April 21, 2010, 06:19:10 PM
This is what i have so far

GA-P55A- UD3L MB
Intel i5 1156
DDR3-10600 (2X2GB sticks)
Centurion 550 mid tower case w 2 fans
400W power supply

After assembly I tried powering it on and it comes on for 1 -2 secs then powers off in a continous loop, I disassembled everything down to just the CPU and CPU fan and still problem remains.  When I plug in the 4 pin 12v connector it doesn't come on at all......any suggestions?......Thanks in advance
Title: Re: Motherboard powers on for 1 -2 secs then powers off continuous loop no post beep
Post by: EEVIAC on April 21, 2010, 09:35:11 PM
Power_good signal maybe..

Try another power supply of equal or greater wattage.
Title: Re: Motherboard powers on for 1 -2 secs then powers off continuous loop no post beep
Post by: Cityscape on April 21, 2010, 09:48:48 PM
I've had this 1-2 second power on-off thing before. For me it was a loose screw that was short-circuiting my Mobo. Check for loose screws.