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grey screen with white lines

Discussion in 'Electronic Repair' started by [email protected], Jan 21, 2007.

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  1. Guest

    I have a 27 inch Hitachi tv model number 27cx3b. When I turn the tv
    on the screen is grey with white lines on it.
    The audio is fine and everything. I did search to see if there is a
    fix for this and found that there is a resistor, that is going bad.
    The number of the resistor mentioned is 3340. I couldnt find it on the
    circuit board anywhere. So i was wondering if the number is different
    for the Hitachi. THe tv was free, so if its junk no big deal but if I
    can fix it with a 99cent resistor i will. Thanks for the help.
  2. Jim Land

    Jim Land Guest

    wrote in
    Are the lines horizontal or vertical? How thick are they? Can you hear
    the sound OK?
  3. Art

    Art Guest

    Check the bias voltages on the crt and Video output devices. Suspect the g2
    source voltage being low or missing. Source is normally from the LOPT via a
    fusible resistor, rectifier, and filtering cap.
  4. Guest

    The sound is fine, nothing wrong with sound, just the picture. The
    lines are white horizontal lines, that are pretty thin. the whole
    screen is grey.
  5. b

    b Guest

    g2 bias missing. look for open resitors or bad joints on the soldering
    around the line transformer.
  6. Guest

    Thanks for the help. Not sure what an open resistor is or looks like
    but I will find out
  7. Then why on earth are you working on a TV? If you aren't qualified, a TV is
    no place to start.

    Having said that, my vote is for a missing 200 volt line.

    Mark Z.
  8. Guest

    Sorry Im not big shot like yourself on tv's, Never said I was the one
    fixing it any way. All I wanted was some insight on what could be
    wrong with the tv, so maybe i could get it fixed.
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