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LCD monitor symptoms ...

Discussion in 'Troubleshooting and Repair' started by softdown, Jan 29, 2009.

  1. softdown

    softdown

    4
    0
    Jan 26, 2009
    My LCD monitor used to turn on very quickly after pressing the power button.
    Recently, when I press the power button, the monitor doesn't seem to turn on immediately: the screen remain black and the power-on LED is turned off.
    After a while the screen turns on and also the power-on LED. Once it's on, it works perfectly. It seems that it takes more and more time for the monitor to turn on after pressing the button.
    I'll try to repair it - any ideas what to look for ?
     
    Last edited: Jan 29, 2009
  2. softdown

    softdown

    4
    0
    Jan 26, 2009
    I'm thinking it's either the power supply or the inverter for the light tubes.
    Both those circuits are of the switching supply type which I understand reasonably well. What puzzles me is that the monitor only has problems starting, but after then it works very well.
    Any ideas what type of defects exhibit this behavior ?
     
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