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Crt TV Repair - Microcontroller issue ?

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    Crt TV Repair - Microcontroller issue ?

    Hello all!

    I have an old Crt TV but mistakenly I touched some pins of the micro controller that handles the remote and the keyboard buttons.
    The TV shut down then I switched on again but now the remote controller has no effect and the only buttons that work are for changing channel but cannot set volume ,brightness etc anymore.
    Before I touched the pins all worked perfectly.

    May the micro controller got somehow corrupted ?
    And if so changing it with same model may solve the problem or these things are programmed by the tv manufacturer so the new controller would not know what to do ?

    Big thanks!!

    #2
    Re: Crt TV Repair - Microcontroller issue ?

    Where you grounded before you poked around?
    I assume no responsibility for any stupid suggestions I might post.

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      #3
      Re: Crt TV Repair - Microcontroller issue ?

      If you shorted pins, the part could be damaged. Also if it was zapped by ESD.
      If you change it, you should use part from same TV model, not just same part number on IC.
      But I've read in some forum a while ago that applying some heat to chip can fix it.
      Last edited by alfatv; 11-24-2021, 02:57 PM.

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