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Benq FP91G 19'' fades out

I have a Benq FP91G 19'' LCD
When i turn it on, it comes on very light, then fades out very quickly.

If someone can tell me what is wrong then i know if its worth getting it fixed
or maybe get a part to fix it.


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  • lockie2 Jan 31, 2010

    Thanks for the reply

    I have pulled the monitor apart, found the board.
    There is a few capacitors on the board
    Can you tell me which capicitor i need changing please

  • lockie2 Jan 31, 2010

    Thanks for the reply

    I have pulled the monitor apart, found the board.
    There is a few capacitors on the board
    Can you tell me which capicitor i need changing please

  • lockie2 Jan 31, 2010

    Thanks for the reply

    I have pulled the monitor apart, found the board.
    There is a few capacitors on the board
    Can you tell me which capicitor i need changing please

  • lockie2 Feb 02, 2010

    As you can see from the image on my last reply the capacitors look fine
    no bulging, none of the tops look like anything is wrong.
    Will replacing all of them definitely fix the problem do you think?



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Capacitor problem on the power board internal solder fix is possible.

Posted on Jan 31, 2010

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  • Scott Hill
    Scott Hill Feb 01, 2010

    the capacitors that are domed or have colored leakage will need to be replaced.
    please look here for images of damaged caps

  • Scott Hill
    Scott Hill Feb 02, 2010

    OK if there are no puffy caps then the problem is related to the transistors called MosFets. this is something that a service center will need to do the easiest thing at this point is to replace the power pack. I am sorry if this is not the answer you wanted to hear , however I am not going to lie to you .
    the MosFets supply power to the lamps, what is happening is that the MosFets are undervolting or Overvolting and the monitor is saving itself from a Fire situation. It is a soldering situation and it can be complicated so I have to advise to take in for service center or buy a power pack for it (e bay is cheap) or get a new monitor.



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