GA-P67A-UD5 no boot: Both CPU VTT Phase Indicator LEDs simultaneously lit

[Dark Mantis]

Hi and welcome to the Gigabyte Forum.

I would tend to think it is a PSU problem, even though it was a good quality and fair size when it was new. If you can try a different GPU (older one) with it and see if that makes any difference it would be  a good idea.

[G.E.X]

All parts are brand new, but i'll try my old gtx260 to eliminate GPU problem

[Dark Mantis]

It will help to see if it is just a problem with the PSU struggling to supply enough power for everything.

[iboyinc]

Clear <Zap> Beep beep beep.  Reviving  thread to save repetition.

My rig has been working for a year, then without notice, turn it on one morning and I get the symptoms in this thread.  No POST, every 3 secs tries to switch on for maybe 1/2 sec.  No beeps, GD1 and GD2 hard on.  A few blue leds christmas tree sparkles.

Two notes:
- It is possible that the successful boot I updated the Graphic drivers (GTX470).  Warm reboot was successful.
- It is possible the last known operational state was left to hibernate.  I just starting letting the beauti hib'ing.

P55A UD5
i7 860
Corsiar 750W Hx
Corsair Dominator 4G TW3X4G1600C9D

Things I've done/tried:
- Isolated all from the mobo bar CPU/fan, case fans, mem and PSU (and front case connectors).
- Have installed a cheap PCI bus powered graphics card.
- Have tested and swapped PSU.
- Reset mobo bios factory defaults.
- Pulled the Bios battery and power cable and allow to sit for a while.
- Googled my brain out.
- Thinking of buying a cheap(?) CPU to swap and see.

Any thing else to try?  My wife has daggers in the eyes and reminding me of the money I spent.