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TV turns off when changing channels

Discussion in 'Electronic Repair' started by railbird, May 9, 2007.

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  1. railbird

    railbird Guest

    I have a Samsung TXE1970. I don't have a remote. Lately, when I try to
    change channels by pushing the < > buttons on the front of the set,
    the TV turns off; sometimes it will change channels in the wrong
    direction(eg, go from 6 to 7, instead of 6 to 5). The "turn off"
    usually happens when trying to go to a higher numbered channel(the >
    button). I haven't done any DMM tests yet, because the board/wires are
    a tight fit, and it's going to be a hassle to try to duplicate this
    problem with the board out of the chassis. I am hoping someone can
    tell me the most likely thing(s) to check: is this more likely just a
    loose solder joint, some mechanical button/spring issue, or a
    component prob? Thanks.
     
  2. Sofie

    Sofie Guest

    It sounds to mike like contaminated circuit board and/or switches... maybe
    cracked board traces or bad solder connections. To verify that the
    problem is only there and not in the system control chip in the television,
    I would go to WalMart or Radio Shack and get a $cheapo universal remote and
    verify that the problem only happens with the front panel switches on the
    television.
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair
    - - - - - - -
     
  3. Hi!
    It really sounds like the control board is being "pressed" in the wrong
    places. Is the front panel cracked or damaged?

    In some sets, the buttons are connected together by thin molded plastic.
    Over time and use, this connection between buttons can or will break. This
    can cause the buttons to become misaligned or to press on the wrong button
    inside the set.

    You could open the set and (carefully!) try operating the buttons directly
    to see if they work properly. A cheap universal remote (as previously
    suggested by another poster) would also make a decent test and may be the
    fastest solution.

    William
     
  4. Gary Tait

    Gary Tait Guest

    It might not be like my Quasar, but my TV uses a set of resistors with the
    buttons on the front panel, and that gets pretty wonky. Fortunately, I
    exclusively run it by remote.
     
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