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Benq LCD monitor FP72G

Discussion in 'Electronic Repair' started by Tony Leathem, Jun 8, 2007.

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  1. Tony Leathem

    Tony Leathem Guest

    Hi everyone,

    A friend of mine gave me this monitor he bought at a garage sale for next to
    nothing.

    yellow power light at turn on of power point
    green light when turning on computer,
    but no image on screen
    slight flash of white if I turn on and off at power button

    Anyone have any ideas as I have NEVER been inside one of these as yet.

    Cheers and thanks

    Tony..
     
  2. Arfa Daily

    Arfa Daily Guest

    Probably a failed backlight inverter - very common. When it is at the point
    where it should be displaying an image, shine a strong light at a flat
    angle, onto the screen. If you can see a dim image, then you have no
    backlight. Could be the inverter board, could be one of the CCFLs loading up
    the inverter and stopping it. Replacements might be found at

    http://www.lcdpart.com/doc/ccfl.html

    Arfa
     
  3. Poxy

    Poxy Guest

    Check the cap(s) in the power supply - I have an oldish Samsung 18" screen
    where the only fault was the main (big) cap had died.
     
  4. Meat Plow

    Meat Plow Guest

    18"?

    Never saw an 18" :)
     
  5. JW

    JW Guest

    NEC 1810 (P.O.S.)
    Inverter is about as reliable as a Yugo.
     
  6. Meat Plow

    Meat Plow Guest

    Maybe Yugo made it?
     
  7. DJMick

    DJMick Guest

    ther have a 3 year warrenty and arent even 3 years old yet try to ring benq
    and say youve lost the reciept they have a man date on the back as long as
    its not 4 years old thell fix it
     
  8. conundrum

    conundrum Guest

    yeah, i have seen a few of these wee beasies. Change all of the 1000
    uF capacitors near the inverters, even if only one is bulging.

    Also check:- the two drive transistors on each inverter, if one has
    gone bad then it will stop the monitor in the way you describe.

    regards, -A
     
  9. Rudolf

    Rudolf Guest

    Most likely shorted on or two transistors on inverter PCB due to bad solder
    on transformers in inverter.

    Rudolf
     
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