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Television Vibration

Discussion in 'Electronic Repair' started by Grinder, Nov 23, 2004.

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  1. Grinder

    Grinder Guest

    I have an older (10-15 years) Magnavox 19" color TV that is serving me
    well. Recently, however, it has developed a sort of nervous tic.
    Something within it is vibrating enough that it produces a noticeable
    buzzing noise. If I put a dictionary on top of it, the housing is
    damped enough to kill the noise, if not the source of the vibration.

    When it does appear, the set has always been on for at least an hour.
    But it does not always appear when the set has been on. Somewhat
    unexpectedly, if the television is turned off, it takes perhaps 15
    minutes to stop vibrating.

    Does anyone have any speculations about cause and/or remedy?
  2. Are you sure it's not a secondary issue such as the furnace fan running, or
    something? You might try setting it on a rubber mat or a towel or something
    to isolate it from external sources.

  3. Sofie

    Sofie Guest

    ....... and..... the model number is? chassis number?
    You say this happens when it is turned off? How about unplugged too?
    Might be caused by SMPS transformer noise due to high esr electrolytics?
  4. Are you sure there is nothing else in the building where you live that
    could be vibrating at a subsonic frequency that you don't feel that is
    triggering something in the TV to vibrate? If the "after turned off"
    vibration happens again, what happens if you unplug the set from the
    wall? It may be that the heating loosens up something that then
    vibrates in response to an outside source.

    H. R. (Bob) Hofmann
  5. BWL

    BWL Guest

    probably a loose magnet in the yoke assembly; Mag/Philips hd problems with this
    during the years when your set was built; difficult to fix for a novice; if a
    book on the set kills or dampens the vibes, get a big thick one and leave it
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