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Thread: Compaq Portable 486 screen replacement

  1. #11
    Join Date
    Oct 2016
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    Dutchess County, New York, USA
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    That sounds like it could be a device driver issue. Is the screen only in reverse once in DOS, but not if you enter the BIOS screen? That would be a good test to see if driver related. Or perhaps there's a driver setting or even a function key to reverse video. Only other thought is that on some old style non-tft LCD's adjusting the contrast too high might make the display look reversed.

  2. #12

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    Quote Originally Posted by DeltaDon View Post
    That sounds like it could be a device driver issue. Is the screen only in reverse once in DOS, but not if you enter the BIOS screen? That would be a good test to see if driver related. Or perhaps there's a driver setting or even a function key to reverse video. Only other thought is that on some old style non-tft LCD's adjusting the contrast too high might make the display look reversed.
    No, I misspoke... I hadn't run that machine in quite some time. Even on a DOS boot and in the BIOS Setup it's reversed. But with an external VGA monitor it's normal in all modes, BIOS, DOS and Windows. So, apparently it the laptop's screen that's at fault.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  3. #13
    Join Date
    Oct 2016
    Location
    Dutchess County, New York, USA
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    49

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    Most likely the LCD, but check the cable out first.

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