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CTC170 bizarre problem

Discussion in 'Electronic Repair' started by James Sweet, Feb 7, 2007.

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  1. James Sweet

    James Sweet Guest

    A friend of mine was recently given a 35" Proscan with the CTC170
    chassis. I've repaired a number of proscan sets but never one like this.
    My first impression of the chassis is that it looks like a nightmare to
    do anything with. Test points are poorly labeled and hard to see, and
    the tangled mass of wires and boards is difficult to get to.

    The set has a strange problem. When you turn it on, the screen has a
    raster but there is no picture or sound, just blackness. Sometimes a
    large rectangle will appear in the upper middle of the screen which is
    filled with gibberish, it almost looks like static but is in various
    colors and sections of it occasionally flicker. User controls create no
    visible response aside from the LED on the front blinking to acknowledge
    the button press. The problem does not seem to be thermally or vibration
    sensitive. Anyone got any ideas on this one?
     
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