Video image reversed and upside down even at boot

Posted on 2011-05-09
Last Modified: 2012-05-11
Here is a really weird problem I've never seen.  I have an Intel 915 motherboard with a Pentium 4 CPU that was working fine.  I changed the power supply and when it booted up all of a sudden the video image reversed (like mirror writing) and is upside down.  This happens even when booting into the bios.  

Any suggestions on how to fix?
Question by:caaron
    LVL 14

    Expert Comment

    Do you have an Nvidia display adapter in the computer?  If so then boot into windows and open your Nvidia Control Panel.  Go to display and click on rotate display and select 180 degree rotation.
    LVL 1

    Author Comment

    No, that didn't work.  It is most likely at the bios level since even the splash screen comes up backwards and upside-down on boot.  I cleared the bios but it still comes up that way.  
    LVL 62

    Expert Comment

    by:☠ MASQ ☠
    So it's reversed in that you can read it if you turn the monitor upside down and look at it in a mirror?  
    Is the picture quality otherwise OK?
    Assuming you are currently using the integrated graphics VGA connector do you have a spare PCI-E graphics card around you could put in the top expansion socket on the board to see if you get a normal image?
    If you're lucky something has got loose during the PSU fitting, worst scenario is you've shorted part of the GPU circuitry
    LVL 1

    Accepted Solution

    I found the problem--it was the monitor.  I powered it off and plugged it back in and all was OK.  Must've been a static zap that did it...

    LVL 1

    Author Closing Comment

    I overlooked the obvious...

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