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Lexmark x644e LCD Display Upside Down(Inverted)

Hey Guys,
We have a weired problem with Lex. x644e. The LCD Display is Upside Down (Inverted). Rest of the things are fine, its printing fine, no problem at all. When turn on the printer the LCD Display is fine for about few seconds then it goes Upside Down immediately. What could cause this????
Any help in this regards will be appreciated.


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  • robert gordon Sep 04, 2008

    same thing on an X646DTE upside down and back to front display

  • maq_ans Dec 22, 2008

    Hi there,

    I think I got a permanent fix for this problem. This problem could be because of the the LCD Screen, Right Side Operator Panel Board or the Ribbon Cable connection between LCD Screen and the Right Side Operator Panel Board. Most of the time reseating the ribbon cable that connects to the Right Side Operator Panel Board should take care of this problem. I think the ribbon cable gets loose and thats what causes this problem. Dont ask me how this happens but trust me I tried this on number of x64xe printers and it works fine.

    Thank you

  • sam88kid May 11, 2010

    Is this from when new or happened all of a sudden?



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Hello there,

I've seen this before. The X64X series with this inverted display seems to work fine (printing,scanning,faxing..) the reason for this is still unknown. But I've got it fixed twice by resetting the NVRAM on this MFP. If you are unsure of how to reset NVRAM, please follow the instructions below:

1.Power off the MFP
2. Hold down the 6, 7 and 8 buttons down and turn the MFP On.
3. Please hold down the buttons till it reads resetting factory defaults and then release the buttons. The MFP should now come back to ready status.

Please check out if this solves the issue, If not the machine would need a hardware service.

Merry Christmas!

Posted on Dec 20, 2008


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