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Old 01-27-2005, 06:26 PM   #1
sovietpower
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Video Card Failure or Motherboard Short??


I just transferred my system to a new case of the same model because I accidently (while rewiring the inside) cut the power button wire with the jumper on the end. So I bought a new case and all and put the guts in it today. The problem is I have no video now what so ever. I have all the cables where they should be including the power to the video card. I thought it might be the AGP slot on the motherboard but then again why would the power to the video card come on if the slot was fried? the card's fan spun with the power cable in and out of it so I know something is going through that slot, I have tried my monitor on other systems and it works any ideas as to why I wouldn't get any video?
 
Old 01-27-2005, 06:36 PM   #2
Brian1
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Do the basics. Power supply, motherboard with processor installed, and video card. No hardrives, floppy, cdrom, usb cables, or anything else. Verify jumpers. See if video comes up. If not make sure the video card is seated fully and correctly. Try again. If not remove the motherboard from the case and set the motherboard on a nonconductive surface and try it again. If it works then either something grounded to the case or maybe a screw is to tight and has damage the motherboard traces or layers. If not then something is bad. Can anyone of the items.

Brian1
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Old 01-28-2005, 12:12 AM   #3
sovietpower
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I did what you said and did manage to have it working for a little while until I started hooking up my other stuff. I did notice something strange, sometimes when I go to turn it on it goes on for a sec then stops does this mean something is grounded?? I have a feeling thats what the problem is. Although I doubt any of the screws to the motherboard could be too tight because it has worked fine ever since I built it and the case has a removable motherboard tray and all I did was take it out from the old case with the same tray and put it in the new one, btw I love the linux community so helpful
 
Old 01-28-2005, 03:17 AM   #4
thero
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I did what you said and did manage to have it working for a little while until I started hooking up my other stuff.

Does that mean you saw video, or the computer powered on temporarily?

It definitely sounds like a grounding issue to me. The classic symptom is when you press the power button, the power-supply fan spins for a second, then dies. If you saw this, then the system is most likely grounding out somewhere.

Did you try removing the motherboard from the case completely, connecting just power, ram, video card, and keyboard? ( Just verify you can get to the BIOS, and hence video is working or not.) I recommend setting the motherboard on top of a large anti-static bag. How is the motherboard attached to the case?
 
Old 01-28-2005, 06:55 AM   #5
Xerop
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I had this happen to me I think it might be your power supply. This happened to me when I hooked up a floppy drive incorrectly (couldn't see what i was doing and shifted the power cable) my power supply died then all that would happen is it would come on for a second or so then the thing shuts off. Luckily nothing but the floppy and psu (power supply unit) died.

So anyway try a different psu!
 
Old 01-28-2005, 09:43 AM   #6
sovietpower
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I have a feeling it is grounded somewhere although I dont know how this is possible. My case is pretty slick removable, motherboard tray, easy rails for the hard drives and CD-Roms. I had this working perfectly in the other case and it was the same case and its put in the exact way it was before. The power supply is not an issue on my sig you will see what I have. Enermax makes some of the best power supplies and it has been working fine never had a problem with it. The video did come on when I had just the mobo, ram, cpu, and video card in. It even worked after I hooked up my hard drive and then I put in some more items and it stopped working I am going to redo everything in there I will try taking the board out and maybe loosing the screws first on the tray to see if that helps. Thanks

Last edited by sovietpower; 01-28-2005 at 09:44 AM.
 
Old 01-28-2005, 09:58 AM   #7
Crito
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Yeah, most likely a motherboard isolation/grounding prob. I'd put electrical tape on the tray mounting holes and any other raised areas that might come in contact with bottom of mobo.
 
Old 01-28-2005, 01:34 PM   #8
sovietpower
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I have found the source of the problem but do not now how to solve. Whenever the power is connected to the video card the system boots maybe 15% of the time when it isnt it boots 100% any ideas on whats the problem???

Last edited by sovietpower; 01-28-2005 at 03:49 PM.
 
Old 01-28-2005, 06:35 PM   #9
Brian1
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I'm guessing it might be a power supply issue. Either not large enough to power up all devices from a cold start or is unbalanced outputs.

What kind of power connection is to the video card? Does it only power a fan or something.

If you only have the basic again does it boot evertime?

Did you remove it from the case and install all hardware on it? Does it boot evertime this way?

Brian1
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Old 01-28-2005, 09:43 PM   #10
sovietpower
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I fixed everything although my hard drive died today along with all these other problems it boots fine all the time now. The video card has a seperate molex connector being a Radeon X800XT.
 
Old 01-29-2005, 12:45 AM   #11
Electro
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You did not have to get a new case because repairing a wire is very easy. There is nothing special for the switch that turns on the computer. You just need to strip off the insulation to get to bare wire. Then twist the two ends of the wire. You may need a wire if the two ends are not long enough.

You learned the hard way that computers are fragile.

This thread should be in the general discussion forum instead the Linux hardware forum.
 
Old 01-29-2005, 01:31 AM   #12
sovietpower
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Ooops sorry will post anything like this to general next time sorry
 
Old 01-29-2005, 11:26 AM   #13
Xerop
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Its probably as said earlier, your psu isn't large enough get something with like 400w and up, something serious though, I mean if you have enough money for the x800xt then you should have enough for a nice psu. I have a 480w neo psu from antec (i run 9800 pro) its working great. Before i had a 400 w who know what my system wasn't stable (the psu was fine allthough not strong enough.)
 
Old 01-30-2005, 01:15 AM   #14
sovietpower
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did you not see what I said? I have an enermax 550W and I know it works because it did before this all happened
 
  


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