Quote Originally Posted by kortas View Post
Disconnect everything from your mobo SATA Cables everything,

Connect your 24pin atx connector, and also the 12v plugs to the left of the cpu socket.

1, Is your PSU known to be good? if so goto 2,
2, Is your CPU and RAM known to function? Reseat CPU and RAM if so goto 3,
3, Reset CMOS goto 4,
4, Disconnect all cables (including power and reset switch) apart from cpu fan header from your mobo goto 5,
5, Try power up now still not working goto 6,
6, Cry and raise an RMA & pop it in the mail.
@Performance
A few thing to add:
1a. test PSU by turning it on with a paper clip (green and black wire)
1b. check voltages with DMM
2. skip it if you want. bad CPU or RAM should not make MB not POST.
3. you did this, right, so no need again.
4a. after disconnecting all cables, take your MB out of the case! people had problems like short circuits doesn't allowing them to power on.
5. power on with just a PSU connected. MB must switch on even without CPU and RAM.