Problem with Gigabyte GA-870A-UD3

[jibagast]

Hi...I have just build a system MB is gigabyte GA-870A-UD3, 4 gig DDR3 1333, Athlon II quad core,and graphic is pci ex x16..the problem is it will not POST. the manaul instructs to connect the 24pin power and the 8 pin 12v but it wont power up with the 8 pin 12v connected either way no POST..any ideas?

[Sola2k]

check these links

this one is mine, im having a similar problem
NOT POSTING! Gigabyte UD3R Rev2 new build. - Hardware Peripherals

another one
GA-X58-UD3R reboot cycle, no POST

another one
Could this be a sign of DEAD Mobo GA-EP45-UD3R (rev. 1.1) ?

best solution im too scared to try
Fixing Gigabyte GA-X58A-UD3R Endless Reboot Issue » Adam's R&R

[VRX]

@sola
you gave him links to the s.1366 mbo :)
and he has AM3 socket...

well,since you didnt write the model of power supply ,can't tell much.
1. check all connectors
2. clear CMOS ,or thake the battery out for a couple minutes,with power connector unpluged.
3.try with only 1 stick of ram and gpu connected ,then try with other.
4.try with another power supply (if you are unsure that yours can run the sistem/or it's old or faulty)

5. does the mbo make any beeping sound?if so,check your manual and se what does it mean. bad cpu/ram/mem/something else...

and if nothing works,the board is maybe ready for RMA.