Question about Asrock K8Upgrade-VM800 Motherboard

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Acer monitor does not get signal every time

Acer monitor will only accept a video signal on every other start up. Once up, it's fine until the next power down and then system needs to restarted twice before it boots.
I'm running an AMD K8Upgrade-VM800on an ASRock MB. I have tested the power supply, replaced the HD, Disabled onboard video and added a GeForce2 MX video card.
Same problem. I'm hestitant to flash the bios, but I suspect it to be either the Bios or the processor.
I am completely stumped.


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  • jottharris Mar 08, 2009

    The monitor is an ACER LCD model X163W. I also plugged in an old Viewsonic crt and the same thing happened.

    There does not appear to be newer drivers, or I can't find them. Grrr.

  • jottharris Mar 08, 2009

    Sorry, I forget the MB info.
    The Motherboard is an AsRock K8Upgrade-VM800 Socket 754 with an AMD Sempron 2600+ processor.
    Integrated UniChrome Pro 3D Graphics in VIA® K8M800 chipset

  • jottharris Mar 08, 2009

    Sorry, I meant to ask for the newest drivers for the onboard UniChrome Pro 3D/2D Graphics controler.

    As it is now, with the GeForce Graphics Card installed, the system is doing exactly what it was when the onboard configs were active.
    Start it up, turn it off or try a restart and the monitor goes black and then displays "NO SIGNAL"
    Then I have to Power off, using the rear switch, power back on once or twice for the system and monitor to load it to normal.
    Can Anyone tell me how to fix this? Please. My sanity is at stake.

  • Dick
    Dick May 11, 2010

    The processor has nothing to do with your video signal. So let's rule that out. The GeForce 2 series has hardware that is far older than the motherboard you are using. Your onboard video is probably a lot better. Which motherboard are you using? I'm leaning towards a bios problem, have you tried the default bios settings for compatibility? Make sure you write down your current settings before you change anything.


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If anything try updating the video card drivers. That's what it sounds like, or the monitor is going. The next time the monitor fails to start, just unplug from the input and put back in. If it starts you are looking at a bad power booster on the board. You can also try pluging in another monitor or try that monitor on a different machine. This way you can eliminate which is bad. I had flat panels and crt's go on me and they usually start by this symptom. It shouldn't be the BIOS, if it's been working right along, same with the processor, it either works or doesn't, it's a monitor scenario.

Posted on Mar 08, 2009


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