GA-EX58-UD4P POST failure

[nighthawk_42]

I have an issue very similar to a previous poster, with the same motherboard......but I am VERY sure that I have both the ATX power cables plugged into my motherboard. The system fails to POST, no beeps, no output to the screen.

When I use the power switch on the computer (either from case or one on motherboard), all case fans, CPU fan and video card fan come on. The following LEDs are on from the motherboard:

The NB Phase lights are green to yellow (there are 4 LEDs on, in order, they are 1-green, 2-yellow, 1-green, 2-yellow), and the PHASE_LED are all on...from green all the way to RED. Both sets come on immediately once power is supplied.

<tried to paste in MB diagram of LEDs>

Both ATX Power 24-pins and ATX_12V are connected (previous poster with the exact same condition forgot to connect the ATX_12V connector.

I have done all of the steps listed in MaxiumPC or Tom's Hardware troubleshooting guide (connect outside of the case, reseat everything, try minimum memory configuration, remove video and all other items, etc....and all have the exact same results.

About to RMA the motherboard back, but wanted to post here to see if there is anything I should try first.

Motherboard: Gigabyte GA-EX58-UD4P
Case: Antec nine hundred
CPU: Intel Core i& 920 Nehalem 2.66 GHz LGA 1366 130 W Quad-core
CPU cooler: Zalman CNPS9900LED
Memory: G.SKILL 4 GB (2x2 GB) DDR3 SDRAM DDR3 1600 (3 of them in final build)
Power supply: Antec Signature SG-850 850W Continuous Power ATX12V

Thoughts?

Thank you,
Tom

 

[r_manic]

RMA-time! I personally wouldn't bother anymore, especially when I can take advantage of the return support.

 

[bilbat]

We've got to get you into the BIOS - I'll hunt around for a while - I've seen someone with about the same setup, and he was able to at least get through POST, but only by putting one stick of RAM into one particular slot - more than one, no POST; any of the other five slots, no POST... It was in the past week (I think the past few days) so I should eventually be able to find it...

As for this:

RMA-time! I personally wouldn't bother anymore, especially when I can take advantage of the return support.

this is exactly the attitude I continually preach about here - RMAs with no rhyme or reason, driving up the prices from both the manufacturer and vendor... I've seen many people pondering their third RMA - for the same problem! Problems with these boards are endemic, across the industry - you signed on for it when you decided to go with a completely 'history free' new technology...

I warned loudly when the technology approached release, and was, pretty much universally, pooh-poohed!

I have a vested interest in getting this technology 'licked', as I'm planning a 4GHz+, 12GB 32-bit server (WHS - as there is only 32-bit) using 9 Gig as a ramdisk for the swap partition, and a hardware, Intel IOP333 based, 1 Gig cache, 13 TB RAID6 array with a hot-swap spare - so I'll need the i7's hardware actually (not 'kind of') working! And I'm sure it can be done - eventually; just some 'tough going' between here and there...

 

[nighthawk_42]

bilbat,

Thanks....if you can even point me to a possible words in the title of that discussion of how to get through POST to the BIOS, that would be wonderful (I can help search for it also).

Since the motherboard manual gave the valid memory configurations, I never considered a single stick attempt.

The key is that the support web site says that a BIOS level of X, is needed for supporting processor Y. The trick, is that you have no idea of what level the BIOS is at (unless I have missed something).

<dream_mode>
I know it will never happen in this class of motherboard, but wouldn't it be great to have an extremely small/cheap CPU which is capable of just bringing you to a limited service function capability without the main CPU in place (to update main BIOS in flash, etc).
</dream_mode>

Last thought....since the failure scenario seems to be the exact same as when the ATX_12V connector is not attached, is it possible that this feed from the power supply might be bad? I attempted to use my trusty volt meter to ensure that the cables are supplying power...but NONE of them (either the 24 pin or 8 pin ATX cables) seem to have voltage (which can't be true...cause I can see power reaching the motherboard. So I have assumed that I am doing something wrong 🙂

Any tried and true way of ruling out the PSU?

 

[nighthawk_42]

Everyone,

I did end up RMAing the motherboard back, and received the replacement yesterday. Hooked it up, and everything worked perfectly....proceeded through POST and into BIOS.....even with the full 12 GB of RAM installed (did not have to remove RAM, etc to get it to function).

Note: The LEDs for the PHASE level still did come on when initially powered on. Once in BIOS, and selecting the option to have the motherboard configure the optimum levels, the LEDS go off. Interestingly, when the computer is first powered on...the LEDs come on until BIOS completes....at which point they turn off.

Installed Windows 7 RC, and when the computer sleeps, and then resumes from sleep, the motherboard LEDS come on and stay on.....next thing to investigate.