Question

Gigabyte GA-EX58-UD4P won't Post

Asked by: Newbietoo

I have just assembled a new PC with a Gigabyte GA-EX58-UD4P mobo that won't POST

To troubleshoot, I have removed the mobo from the case, sat it on an anti-static mat, removed the memory and disconnected all peripherals, cleared CMOS, and it still doesn't work, so it doesn't seem to be a short. The fans do power up OK

I guess that leaves the speaker (maybe its not working and I can't hear anything?). However I  had originally fully assembled it with a video card and it didn't display anything, which is when I went looking for problems

One thing I have noticed is that the Overclock LED's do light up; don't know why that should be as of course haven't been able to any overclocking (not that I want to anyway). I could also be misreading them as the manual isn't too clear about them other than to state "Normal Condition" is "off"

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Asked On
2009-08-08 at 17:44:15ID24637564
Tags

Motherboard

Topics

Hardware Components

,

Computer Motherboards

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500
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9

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Answers

 

by: garycasePosted on 2009-08-08 at 18:21:27ID: 25052374

Are you using a high quality power supply with the correct 8-pin auxiliary power connector?

Did you connect both the ATX power connection and the auxiliary CPU 12v power plug (8-pin connector)?

Are you SURE the board isn't sitting on any conductive surfaces?

The lights on a Gigabit board will all light up initially, but will turn off once the boot process starts (after the BIOS has completed its POST) ... the fact they're not turning off is consistent with the fact that it's not posting.

You said you "... removed the memory ..." ==> you have to have SOME memory installed to complete the POST.    Install one memory module & try it again -- after confirming that you've got the power connections correctly installed.

Have you been "static sensitive" while handling the CPU & motherboard  (i.e. wearing a well-grounded anti-static wrist strap) ??

 

by: NewbietooPosted on 2009-08-08 at 18:58:14ID: 25052438

Hi garycase

The case is a brand new Antec that came with a 430W PSU

No the 12V wasn't plugged in..that's the one labelled PCI-E right? In any event, I have now tried that and it doesn't like it...nothing happens when that is plugged in i.e. even the fans don't start.

I have tried with one stick of RAM (2gb) in slot 1 right? that didn't make any difference

I don't have an ant--static strap, but am paranoid about grounding before I touch anything. I'm wearing cotton etc

I removed the mobo and sat it on the anti-static bag it cam in, which in turn was sitting on a foam pad

 

by: NewbietooPosted on 2009-08-08 at 19:05:34ID: 25052459

Post script...

Sorry, the PCI-E is 6 pin connector that I plugged in to an 8 pin socket. There is no 8 Pin connector. Should there be?

 

by: NewbietooPosted on 2009-08-08 at 19:09:12ID: 25052472

Post script 2...there is also a 4-pin cable; should I use that...in the 8-pin connector?

 

by: willcompPosted on 2009-08-08 at 19:09:41ID: 25052475

Gigabyte mobos typically do not have an on-board speaker. You must connect an external speaker to speaker pins on front panel connector. It would help if you can connect a speaker. Remove one from a cse if necessary.

garycase provided some excellent advice. If it still will not boot after trying his suggestions, remove and reseat the CPU. Clean off thermal compound and apply new thermal compound before reinstalling the HSF. I have had two instances where LGA CPUs apparently did not make good contact (pads on CPU and pins in socket apparently did not mate properly). Reinstalling the CPUs fixed the problem.

An observation -- contrary to what many may believe, a DOA motherboard is very rare. The problem usually lies in component selection and assembly, not the motherboard. In 20+ years of building PCs, I've had to RMA one new mobo and that was due to a faulty BIOS chip that would not flash. It would at least attempt to POST.

 

by: willcompPosted on 2009-08-08 at 19:11:41ID: 25052481

What video card do you have?

 

by: NewbietooPosted on 2009-08-08 at 19:19:12ID: 25052501

Hey, I think we have lift-off here...I just plugged the 4-pin cable into the 8-pin plug and that worked; it now posts! The 4-pin thing isn't explained at all anywhere in the doco. However, following garaycase's post I googled the 8-pin and 24 pin thing and found a post with a guy that has an ASUS mobo with a 4-pin cable

To answer your question I have an ATI 4770, that I have plugged the 6-pin cable into and got the BIOS display on my monitor, so I guess I'm underway now?

 

by: willcompPosted on 2009-08-08 at 20:25:51ID: 25052682

Yes, the CPU 12V aux power is definitely necessary.

Antec PSUs are good and supply at least the rated power, but -- 430 watts is marginal for an i7 based system. Although your video card has a max draw of 80 watts, you will have little head room. I'd recommend a high quality 500 watt or better PSU. Antec is good, but PC Power & Cooling is better.

 

by: garycasePosted on 2009-08-08 at 23:47:49ID: 25053105

Glad it's working now ... I was out for the evening, but clearly the auxiliary power was the issue.

I'll add a few postscript thoughts ...

=>  As willcomp noted, a 430w PSU is marginal for an i7 system.    I've used several Antec cases, but generally remove the PSU's and replace them with better ones -- either Seasonics or PC Power & Cooling units.     A top quality PSU that provides rock solid, stable power can go a long way in maintaining system stability.    For that system, I'd probably use something like this:  http://www.newegg.com/Product/Product.aspx?Item=N82E16817151027

Your 430w supply is probably okay as long as you don't decide to upgrade the video ... but if you should have any system stability issues, about the first thing I'd do is upgrade the power supply.    Note also that the 8-pin CPU connector is there for a reason ==> the current on a modern Core i7 (which draws 130w -- double what a Core 2 Duo does) is much higher than previous CPUs, so they use 8 wires instead of 4 to supply the extra current.    A 4-pin (thus 4 wire) connection can work (and clearly is); but a PSU that has the appropriate 8-pin connection would be a better choice.

20120131-EE-VQP-002

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