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TV without red turns off

Discussion in 'Electronic Repair' started by Lanzar, Mar 31, 2005.

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  1. Lanzar

    Lanzar Guest

    I have a television with a strange problem. When i start the tv it
    takes about 10-15 seconds before the picure appears. And also the red
    color is missing, so the piture is bluegreen (but no lines). And then
    after about a half minute red fields starts flashing across the
    screen, and then it turnes off. Any idea what cause this?
     
  2. kip

    kip Guest

    Whats the Make ?
    Sounds like bad CRT .

    kip
     
  3. Jana

    Jana Guest

    You should always mention the make and model number of your TV set when
    posting.

    Generally speaking, it sounds like the CRT is most likely defective. CRT
    replacement in a typical TV set, or computer monitor, generally costs more
    than a new unit.

    --

    JANA
    _____


    I have a television with a strange problem. When i start the tv it
    takes about 10-15 seconds before the picure appears. And also the red
    color is missing, so the piture is bluegreen (but no lines). And then
    after about a half minute red fields starts flashing across the
    screen, and then it turnes off. Any idea what cause this?
     
  4. testortool

    testortool Guest

    Probably a bad CRT. I have an almost mint early 70s Sony Trinitron 13" TV
    that has a "flaky" red gun that cuts in and out kind of like what you're
    seeing. Usually when CRT color guns go bad, the red one goes first.
     
  5. Could very well be something other than the picture tube.

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  6. Lanzar

    Lanzar Guest

    Grundig 32" (ST 84-796/TOP/LOG)
     
  7. Barney

    Barney Guest

    As a test try swapping the drives to the CRT over. If it's the CRT then it
    will still flash red, if it's something else it will flash either green or
    blue.
     
  8. Art

    Art Guest

    Check the drive voltages at each of the crt cathodes, compare the red with
    the other two. do this with the socket attached and removed from the crt.
    Trouble shoot the red video drive circuitry before totally condemning the
    crt. If a projection set, try swapping the red drive pwb to one of the other
    crts and see if the set functions, remove the red crt drive and see if the
    set functions. ETC, Good Luck
     
  9. James Sweet

    James Sweet Guest

    If it's a Zenith you probably have a short in the picture tube, otherwise
    who knows, you have to post the brand and model for anyone to help you.
     
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