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Gigabyte Motherboard dead? Help me confirm this!

post #1 of 5
Thread Starter 
Hey guys,

So here's the parts list for the family computer that I'm working with:

-GIGABYTE GA-K8N-SLI 939 NVIDIA nForce4 SLI ATX AMD Motherboard
-ATI 100-435705 Radeon X1800XT 512MB 256-bit GDDR3 PCI Express x16 Video Card
-Antec TRUEPOWERII TPII-550 550W ATX12V SLI Certified CrossFire Ready Power Supply
-AMD Athlon 64 X2 3800+ Manchester 2.0GHz Socket 939 Dual-Core Processor ADA3800BVBOX
-OCZ Platinum 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit Desktop Memory Model OCZ4002048ELDCPE-K
-Western Digital Caviar SE16 WD2500KS 250GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive -Bare Drive

It's about 3 1/2 years old.

So yesterday I noticed while the machine was running as usual the monitor's screen went black. I tried replugging the DVI connector and turning it off/on, but nothing worked. I decided to restart the machine and that's when I could no longer get the machine to POST (no beeps at all) and no graphical output (so no BIOS obviously).

I've been taking components out and retesting the machine in hopes of getting it to POST at some point. One time after reconnecting everything I was able to boot into the OS, but then everything froze on me. Another time with the RAM removed I got the motherboard to have one long continuous beep without any pauses, but sadly rebooting the machine never caused it to give that same error again.

I've gone in with a multimeter and tested about half the lines on the 24-pin connector so far (it's hard testing in that case) and those voltages seem solid.

Right now the motherboard has everything but the 24-pin and 4-pin connector removed (with the exception of misc things like the power button pins). Turning on the machine makes the Case and CPU fans spin as expected, but I get no further process than that.

Oh, I also tried swapping out the PCIe graphics card for a dinky VGA PCI graphics card, but that didn't do anything.

So, does it sound like my motherboard is dead? Are there any other tests I should try which would give me a certain answer? I've looked for swollen or blown Caps but I see none.

This sucks because I only have a week left to fix this system and I might have to order a part online and wait here to replace it
Edited by swkiller - 12/29/10 at 10:45am
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post #2 of 5
Well, does sound like your mobo. You tried the right steps in my opinion to determine the failure. However, you may pull the motherboard and test it outside of the chassis on a solid static free surface. It may be grounding to the chassis on the bottom side. You might also check the capacitors with a capacitance meter as a capacitor can be bad without being blown or leaking electrolytes.
post #3 of 5
Thread Starter 
I took the motherboard out and it's still not responding (other than spinning fans). I guess it wasn't a grounding issue (unless it already blew out the motherboard). I figured it wouldn't be though since this thing has been running for 3 1/2 years.

Hmm, how sure would you be that it's a motherboard? I'm contemplating ordering a $60 replacement. I'd need to do ASAP since I have to replace it before I leave.

Sadly I don't have a good enough multimeter here to do capacity checking.

Also, could the CPU be bad instead? I find it hard to imagine, but I wanted to make sure.
Edited by swkiller - 12/29/10 at 12:03pm
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post #4 of 5
Well, unless you have another board to test your cpu in, then you have no way of knowing for sure. I am a computer technician and networking engineer and based on my experience, you have a bad motherboard. Boards can go bad and still post once or twice. Again, you could still test the capacitors with a capacitance meter, but your best bet if you dont want to solder replace components on the board itself is to buy a new motherboard. 9 out of 10 times it is the board and not the CPU.
post #5 of 5
Thread Starter 
Yeah I think I'm going to have to go with replacing the motherboard. I can replace surface mount and through-hole components, but I don't have any equipment with me (It's all back at college).

Thanks for the help!
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CPUMotherboardOSMonitor
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500W 
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CPUMotherboardOSMonitor
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Power
500W 
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