Home-built Computers AGP slot failure? Asus P4P800SE

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AGP slot failure? Asus P4P800SE E 05-29-08
Posted by E on May 29, 2008, 9:19 pm
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Hello

I have PC where an AGP video card stopped sending a signal to a
flat screen monitor in the middle of playing the Sims 2. The video
card and flat screen monitor where linked via a standard VGA
cable. The user says that the screen froze, or went black in the
middle of a game. This happened only an hour after installing the
game. The machine now has no display, during POST, or booted into
full graphics mode. Before I troubleshooted anything, I knew it
was properly booting into Windows because I could hear it through
the speakers.

This is an Asus P4P800SE motherboard, with an e-GeForce 7600GS,
256MB DDR2 AGP video card.

To troubleshoot, I connected the PC to a known working CRT
monitor, and also changed out the AGP video card. No signal in
either attempt. I did however get a PCI S3 video card to work, and
then checked out a few things in Windows. The machine did not
'crash' or blue screen per say, so it did not leave a minidump
file. There is nothing wrong in device manager. Nothing of
relevance in the system logs. It is interesting to note that if an
AGP card, and the old PCI S3 video card are installed in the
system together, there will still be no signal from the PCI S3. It
must be by itself.

My current thinking is that the AGP slot has failed. I didn't see
any obvious blown capacitors around the AGP slot. I may try a
third AGP card in the slot before I go to something else. If this
is the case, I will have to change out the mainboard, maybe even
consider building another system from scratch. The user is tight
on funds now, so I may have to find a good working replacement
mainboard.

Thanks in advance

Posted by Michael Hawes on May 30, 2008, 5:30 pm
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> Hello
>
> I have PC where an AGP video card stopped sending a signal to a flat
> screen monitor in the middle of playing the Sims 2. The video card and
> flat screen monitor where linked via a standard VGA cable. The user says
> that the screen froze, or went black in the middle of a game. This
> happened only an hour after installing the game. The machine now has no
> display, during POST, or booted into full graphics mode. Before I
> troubleshooted anything, I knew it was properly booting into Windows
> because I could hear it through the speakers.
>
> This is an Asus P4P800SE motherboard, with an e-GeForce 7600GS, 256MB DDR2
> AGP video card.
>
> To troubleshoot, I connected the PC to a known working CRT monitor, and
> also changed out the AGP video card. No signal in either attempt. I did
> however get a PCI S3 video card to work, and then checked out a few things
> in Windows. The machine did not 'crash' or blue screen per say, so it did
> not leave a minidump file. There is nothing wrong in device manager.
> Nothing of relevance in the system logs. It is interesting to note that if
> an AGP card, and the old PCI S3 video card are installed in the system
> together, there will still be no signal from the PCI S3. It must be by
> itself.
>
> My current thinking is that the AGP slot has failed. I didn't see any
> obvious blown capacitors around the AGP slot. I may try a third AGP card
> in the slot before I go to something else. If this is the case, I will
> have to change out the mainboard, maybe even consider building another
> system from scratch. The user is tight on funds now, so I may have to find
> a good working replacement mainboard.
>
> Thanks in advance
>
Try another PSU, or check all voltages present from PSU



Posted by E on May 30, 2008, 9:46 pm
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Michael Hawes wrote:
>> Hello
>>
>> I have PC where an AGP video card stopped sending a signal to a flat
>> screen monitor in the middle of playing the Sims 2. The video card and
>> flat screen monitor where linked via a standard VGA cable. The user says
>> that the screen froze, or went black in the middle of a game. This
>> happened only an hour after installing the game. The machine now has no
>> display, during POST, or booted into full graphics mode. Before I
>> troubleshooted anything, I knew it was properly booting into Windows
>> because I could hear it through the speakers.
>>
>> This is an Asus P4P800SE motherboard, with an e-GeForce 7600GS, 256MB DDR2
>> AGP video card.
>>
>> To troubleshoot, I connected the PC to a known working CRT monitor, and
>> also changed out the AGP video card. No signal in either attempt. I did
>> however get a PCI S3 video card to work, and then checked out a few things
>> in Windows. The machine did not 'crash' or blue screen per say, so it did
>> not leave a minidump file. There is nothing wrong in device manager.
>> Nothing of relevance in the system logs. It is interesting to note that if
>> an AGP card, and the old PCI S3 video card are installed in the system
>> together, there will still be no signal from the PCI S3. It must be by
>> itself.
>>
>> My current thinking is that the AGP slot has failed. I didn't see any
>> obvious blown capacitors around the AGP slot. I may try a third AGP card
>> in the slot before I go to something else. If this is the case, I will
>> have to change out the mainboard, maybe even consider building another
>> system from scratch. The user is tight on funds now, so I may have to find
>> a good working replacement mainboard.
>>
>> Thanks in advance
>>
> Try another PSU, or check all voltages present from PSU
>
>
Thanks for the reply

I checked voltages from the PSU with a multimeter, and I get
slightly more than the specified voltages, 3.3, 5, and 12. I have
a few ATX PSUs lying around. I think I'll have to give that a try.

Extra info (maybe irrelevant). If I go in the BIOS and set it to
look for a PCI video card first, and I have both a PCI and AGP
card installed in the system, I will get a signal from the PCI
card and none from the AGP card. Setting the BIOS to look for an
AGP card first and I get no signal from either an AGP or a PCI card.

Posted by E on May 30, 2008, 10:17 pm
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>>
> Try another PSU, or check all voltages present from PSU
>
>

I just tried a, "Demond Black Chrome 580W" PSU and got the same
behavior. Boots into Windows but no signal from an AGP card.

Posted by Mike Ruskai on May 30, 2008, 6:01 pm
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On or about Thu, 29 May 2008 21:19:12 -0400 did E

[snip]
>My current thinking is that the AGP slot has failed. I didn't see
>any obvious blown capacitors around the AGP slot. I may try a
>third AGP card in the slot before I go to something else. If this
>is the case, I will have to change out the mainboard, maybe even
>consider building another system from scratch. The user is tight
>on funds now, so I may have to find a good working replacement
>mainboard.

It certainly sounds like a failure of the AGP bus, based on what you say. I'd
take a good look at the thermal situation before putting it back together with
a new MB.
--
- Mike

Ignore the Python in me to send e-mail.

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