flashing power light, no boot.

nm85

Honorable
May 9, 2013
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0
10,510
Hello, I'm building my first machine, I have just connected power and the power light is flashing at a 5 second interval and both fans spin also every5 seconds. What's the most likely reason for the system not booting up? components are asus p8z77v-lx intel i5 any help most welcome
 

tranzz

Distinguished
Jun 13, 2008
92
0
18,660
Try reseating all the power cables inc the 12v line to the CPU. I assume the heatsink is on and the CPU fan is conected and spinning also.

A screen shot of the innards would be useful.
 

nm85

Honorable
May 9, 2013
8
0
10,510




Hi I can't upload photo as too large and only have access to iPad at the moment. I have reset and checked all power sources. the heatsink and CPU fan are working but only at 5 second intervals for 1-2 seconds. The onboard LED is not on. I think there may be a fault with the mother board to be honest, would you agree? I've used a meter to check power supply and it's fine. I've also checked all the power connections are correct.