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Toshiba TV w/ horizontal Line...

Discussion in 'Electronic Repair' started by XiaorA2, Feb 3, 2005.

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  1. XiaorA2

    XiaorA2 Guest


    I have a Toshiba projection TV which has a horizontal line going across the
    screen when I first turn the TV on. The Line is maybe 1/4-1/2" in size. After
    about 15 minutes the line starts raising up and eventually goes to the top of
    the screen and disappears.

    Could this be caused by a bad horizontal output transistor?

    I tried replacing all the caps since from my research I see that is the main

    Oh yeah its a model no. TP4871B

    thanx for any help!
  2. kip

    kip Guest

    Ok It sounds like you dont know what you are doing.
    Horizontal line is a Vertical deflection fault possibly bad
    Vert IC ,Bad solder at the base or Bad Filter caps in that circuit.
    Best call somebody in.

  3. Guest

    #1 issue, if the tv has been run with that failure for long, the
    picture tubes have been damaged and the phosphor probably has the line
    burnt into them.
    #2 Time to stop using the tv and call a trained and experienced
    technician to give you and estimate for the repair of the set.


    p.s. No, this problem is in no way related to a bad horizontal output
    transistor. Time to have someone who knows tv repair have a go at it.
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