GB Z77X-UD5H not starting

andicole0 · 22 Sep 2017 at 17:19

Putting together a PC from used bits and having trouble getting the mobo to start. All stripped down to basics and the board powers up for a second or two then stops and repeats. Nothing on the error cide display except what looks like L but backwards.
I suspect the board as I've used 2 different CPUs and 3 power supplies.
However has anyone any experience of the same symptoms?
Andi.

orbitalwalsh · 22 Sep 2017 at 21:55

How old? Have you changed the battery ?
Also could be shorts ? Able to take out of the case and test on the box ?

andicole0 · 22 Sep 2017 at 22:30

orbitalwalsh said:
How old? Have you changed the battery ?
Also could be shorts ? Able to take out of the case and test on the box ?

Sadly done that. Bought used recently but only just had a chance to test.Just wondered if there was a common fault or different reset process.
Andi.

orbitalwalsh · 23 Sep 2017 at 01:41

Is it dual bios ? Can't remember for that model but some gigabyte boards if you held the power button down for like 15 secs it would trigger the secondary one to kick in

andicole0 · 23 Sep 2017 at 09:29

It is dual bios which is switchable easily. I'll have to try fully outside the case but I am suspecting a dead board.
Andi.

orbitalwalsh · 24 Sep 2017 at 09:22

Shame, if you can't pick up another same chipset board , at least the CPU market has finally got competitive!

andicole0 · 24 Sep 2017 at 09:30

The board was second hand and not very expensive. It seems like It's stuck in reset or the psu isn't being started properly. I suppose I could short the psu start pins permanently.
The board has 5 pcie slots which I wanted for mining.
Andi.

andicole0 · 24 Sep 2017 at 12:49

OK I give up. Keeps restarting whatever I do, this is the only display I get but it is there for milliseconds.

Andi.