Question about HP L1940T 19" LCD Monitor

2 Answers


I Have a monitor HP L1940 TFT and if I switch this monitor on without a
line connection to the computer the monitor gives a good message that
there is no line connection !
If I conect the monitor to the computer the monitor displays an intermittent
picture goes on and off(This computer is tested with an other monitor and than it works oke)
If I keep the AUTO pushbutton pressed and held it on pressed the monitor
works oke and the picture is stable
As soon as I release the Auto Pb the monitor start flashing again
Do You have any Idee what can cause this trouble!

Many thanks in advance

Gerard Nieuwenhuijs

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  • 3 more comments 
  • Anonymous Feb 01, 2009

    mine too except nothing happens when i push the auto button

  • Anonymous Feb 07, 2009

    1 sec picture after any push button, then dark.
    what's this`?

  • atoemchen Feb 07, 2009

    same problem: picture, for 1 sec, then dark. repeatable after off-on or auto button pushed.

  • mulberry28 Feb 20, 2009

    I have an HP 1940 monitor. when I start the computer the screen comes on briefly, a white box flashes in the middle of the screen, and then the monitor goes black. I brought it to a local repair place who told me the bulb inside has the bulb repairable or should i toss the moniotr and buy a new one any help on this would be grea thanks

  • mulberry28 May 11, 2010

    how do i fix that?


2 Answers

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  • 1 Answer

I jammed my auto button and the screen now stays on!

Posted on Jun 23, 2012

Your input selector switch is broken.

Thomas, Denmark

Posted on Sep 08, 2008

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I manage a building, located in a suburb of Houston TX. We have had several HP 1940 monitors overheat and start smoking (about 10-15) over the last couple of years. The company who provides IT service,...

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