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Dead MOBO?
#301729 04/13/10 05:46 PM
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Need some help here.

My son plays COD - MW2 and tends to leave it on all day when he goes to school, he at least turns the monitor off, big energy savings there ;\) . He came home yesterday and said the computer was doing something strange, the monitor was displaying the "no signal" screen, So we shut it down unplugged everything, reconnected and still no signal. I have tried all the video outputs (the board is a Gigabyte GA-73PVM-S2H and I had been running with the onboard video), VGA, DVI and HDMI to no avail. I noticed this morning the keyboard appears to be not functioning as well (not able to toggle Num lock). I fear he has baked this motherboard. Any thoughts?


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Re: Dead MOBO?
jakewash #301733 04/13/10 05:52 PM
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Is the machine powering up? Try unplugging it, and holding the power button for 30+ seconds, then plugging it back in, and trying again.

But if the machine powers up, with no video, or keyboard activity, something broke. Could be the CPU or MB. You should get video and keyboard activity even with bad RAM. And keyboard activity even with bad video.


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Re: Dead MOBO?
jakewash #301734 04/13/10 05:53 PM
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You need to start swapping out some parts to confirm if it is the mobo. Easiest would be the power supply and RAM.

Or, you could disconnect the power cord and let it sit for a few hours and then try again if you have no other parts to swap.

Also remember to disconnect everything except the monitor.

Good luck!

Re: Dead MOBO?
#301735 04/13/10 05:57 PM
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It powers up, I can hear the HDD spin up, all the fans come to life. I guess I should check the PS outputs, time to get the meter out or go buy one of these which would be more fun.


Jason
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Re: Dead MOBO?
jakewash #301739 04/13/10 06:17 PM
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I guess it could be the PS, but that's not a very common failure mode where it can power up the motherboard, but not allow it to pass the POST.

Try unplugging everything from the board, USB headers, drive connections, etc. Leave only the monitor connected. See if it can complete the POST then (it obviously won't boot without the drives, but you can still see if it initializes the video).

If you have a spare video card around you could try installing that too. But to me the main factor is still that the keyboard doesn't show that the system is progressing through the booting process.


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Re: Dead MOBO?
ClubNeon #301740 04/13/10 06:20 PM
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 Originally Posted By: ClubNeon

If you have a spare video card around you could try installing that too. But to me the main factor is still that the keyboard doesn't show that the system is progressing through the booting process.
No spare video card and the dead keyboard is what has me worried too. I will try the disconnected MOBO method and see what happens.........


Jason
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Re: Dead MOBO?
ClubNeon #301741 04/13/10 06:21 PM
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I would tend to suspect peripherals first. I'd disconnect everything but the monitor and a PS/2 keyboard (if you have one) and see what happens. Repeat with just a mouse, if it will boot without a keyboard.


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Re: Dead MOBO?
Ken.C #301743 04/13/10 06:32 PM
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As Chris mentioned the POST is your computer passing its? Listen for a “Beep Code” as the computer powers up and tell us what if anything you hear. Also look at the Motherboard itself for a LED readout. If there is one tell us what it reads after the PC powers up. If something major is failing the POST may be the easiest way to tell what it is.

I believe your motherboard uses an “Award BIOS.” though I don’t know what version you are using usually 1 short beep indicates a “good POST.” 1 long beep +2 short beeps indicates a problem with the video card. 1 long beep +3 short beeps indicates the no video card or bad memory on it.


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Re: Dead MOBO?
grunt #301744 04/13/10 06:35 PM
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Gigabytes usually have a 2 digit readout on the board that will give you an error code.


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Re: Dead MOBO?
Ken.C #301746 04/13/10 06:44 PM
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I suspected as much but some people are reporting beep codes on various sites with that board. Either way the POST code is IMO the place to start the troubleshooting from.

Last edited by grunt; 04/13/10 06:47 PM.

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