Harm to PCI Express Video Output by PCI modem

Discussion in 'Asus' started by dro, Jun 8, 2006.

  1. dro

    dro Guest

    Help!!! I somehow made it impossible to use a PCI Express card on my
    ASUS A8N-Sli motherboard. This is what I did. I put a Diamond Supramax
    PCI modem card in the bottom PCI slot on my motherboard. This modem had
    been working in another computer. But now it caused the system to crash
    and when I tried to reboot, my ATI X1800 XL video card would not post.
    There was a long beep and the audible message: System failed VGA test.
    This kept occurring even after I took out the modem card!!

    Since I couldn't get into the BIOS I put an old PCI video card in one
    of the PCI slots and it booted up fine. Then I tried to go into BIOS
    and find out what might be wrong. I tried a couple of things, like
    making my PCI Express the primary boot and choosing Single video card
    but nothing works. I went into system to see if there was an Interrupt
    conflict but couldn't see anything wrong there either. Does anyone have
    a suggestion?
    dro, Jun 8, 2006
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  2. Sounds like its fried the PCI Express Video Card, i'd suggest testing
    with a different PCI-X card or RMA'ing the card
    criticalimpact, Jun 8, 2006
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  3. dro

    Paul Guest

    The pinout for a PCI Express slot is shown here:


    I don't see what the cards could be sharing in common - maybe the
    wake- signal (wake = PME ?) ? It is hard to see, how too high a voltage
    signal, would get from the PCI slot, to a PCI Express slot. I don't even
    see an interrupt signal on the pinout. (Presumably interrupts are
    in-band on the PCI Express ?)

    I guess it is warranty return time, for your video card. And don't plug
    that modem in again :) Maybe a USB modem would be a bit safer.

    I trust you were adding and removing hardware, with the computer
    powered off or unplugged. If the green LED is lit on the motherboard,
    when adding or removing hardware, then stuff can get damaged. That
    would make more sense.

    Paul, Jun 8, 2006
  4. dro

    dro Guest

    I did unplug the computer before adding the modem. Because PCI Express
    is fairly new technology none of my friends have this type of video so
    I can't check my video card out. I did however get a good deal on
    another ASUS A8N-Sli motherboard, so now I will have a backup (when it
    arrives) and something to work with. I appreciate the speed of the dual
    core CPU's anyway so starting a second system seems like a good idea.

    I don't know why there is conflict with internal modems and PCI Express
    but I definitely recommend to everyone to only use external USB or
    serial modems. Someone advised me to take out the CMOS battery to reset
    the CMOS. I haven't had time to do that yet but I will try that out and
    let you know what I learned. It seems that this could be a potentially
    big problem.

    Thanks, Dro
    dro, Jun 10, 2006
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