GA-Z68-X-UD5-B3 refuses to power up

[bootsie_crouton]

Hi,

i have just purchased a bundle consisting of the parts below:


GA-Z68X-UD5-B3 mainboard
corei5 2500K processor
8Gb (2 x 4Gb) Kingston RAM


However after much troubleshooting the system refuses to power up at all, let alone post.  Currently the power button and S4_S5 led light up, but on pressing the power button on the board nothing happens.  I've tried replacing the power supply, removing/reseating the processor and still nothing, symptoms remain the same.  i sent the board, chip and RAM back to the vendor who confirms that their engineers have tested the build and that it posted and started up without issue, but i'm becoming increasingly frustrated with this and cannot seem to find the fault, despite the fact that i have been building my own pc's since 1999 without issue.
Any help would be much appreciated.

Cheers,

[teknology9]

Hi,

Just out of interest which PSU do you have?

If you think it is the motherboard why not contact Gigabyte Technical Support by raising a ticket see the link below:


http://uk.gigabyte.com/support-downloads/support-downloads.aspx



Teknology9

[absic]

Silly question but have you tested the components outside of the PC case by building them on a cardboard box or test bed?

[teknology9]

Hi,

Have a read of this and see if it helps:

http://www.tomshardware.co.uk/forum/261145-13-perform-steps-posting-boot-video-problems

Also, read absic's article up to the point when he puts all of the basic components together, I know you have PC building experience but it wont cost you anything.

http://forum.giga-byte.co.uk/index.php/topic,5704.0.html


More info:    http://www.jonnyguru.com/modules.php?name=NDArticles&op=Story&ndar_id=16

Above all be very careful when testing PSU and electricity in general SAFETY FIRST .

Teknology9

[Dark Mantis]

Hi

Have you made sure that you have all the power cables connected ? Check that the 24 pin and the 8 pin are connected to the motherboard. A lot of people miss the 12v connector near the CPU!

[bootsie_crouton]

Hi All,

Thanks for the comments and feedback so far!  after much poking around and in desperation i hit the reset CMOS button on the board, and it sprang to life!  needless to say i'm really unsure as to why this happened and the power button on the board still refuses to work, but at least i have been able to power it up and confirm that it's not DoA.  Windows installed fine and so long as i don't shut it down it restarts without issue, but this is still a little irritating.

If anyone has seen this behaviour before or has any idea why/how this works and could let me know it would be much appreciated.  The board/CPU/RAM was purchased in a bundle with an over-clocked profile loaded into CMOS as a profile, i have my suspicions that this may be related to the issues i'm facing however as above any feedback/comments would be most welcome.

Thanks!

[Dark Mantis]

Are you running the system overclocked now or is it back to default timings ?