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LCD Acer.

Discussion in 'Electronic Repair' started by Dani, Aug 30, 2006.

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  1. Dani

    Dani Guest

    Update..as it warms up after 20 minutes, or so, the unit has tiny specs
    throughout the screen, very, very tiny specs, the the right half of the
    screen starts to shake from left to
    right, it gets so bad the screen gets like it, & it's totally
    unwatchable. Model # AT-3201W Part # EV.M0307.002 shuts off after about
    an hour. Anything common on this unit? Thanks, Dani.
     
  2. Morse

    Morse Guest

    There's not much the average person can fix in an LCD other than the
    backlight. It seems you have a logic fault and Acer may not supply you with
    new parts, even if they did they'd likely approach the price of a new
    monitor.

    It *might* just be faulty decoupling electrolytics causing noise on the
    supply rail, but that's a long shot. Try freeze spray and a hot soldering
    iron on the caps and see if anything changes.

    After that, try the freeze spray on ICs and other semis, at least it should
    pinpoint where the fault is.

    If it's serious (ie bad ICs) your only real hope is to find an identical
    donor LCD with a cracked screen and swap the PCBs. Failing that, I'd give it
    up.

    Dave
     
  3. Guest

    Dani :
    I have had mixed results re-soldering the main video controller board
    within the monitor. Sometimes it works real good. Other times it does
    nothing to fix the problem.
    I think they use multilayer boards and sometimes these boards
    develop contact problems between the layers. I even try to solder
    the solder-thru holes that connect the different layers.
    The use of freeze spray is a good idea when trying to locate the
    area of the board that is causing the problem. Also, it is a good
    idea to use an ESR meter and check the electrolitic capacitors.
    I have seen some puffed-up ones on LCD monitors that were only
    2 or 3 years old.
    The manufacturers will not sell you parts for these monitors.
    Hope this helps....
    John
     
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