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Monitor is blank and makes a snapping sound

Discussion in 'Electronic Repair' started by J, Nov 10, 2004.

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  1. J

    J Guest

    I have a Dell monitor (the exact type escapes me for the moment, but I can
    check it out if necessary) which no longer works. If it is turned on, but
    the computer is not, nothing seems to be the problem, as the LED seems to be
    working correctly. If the computer is turned on, however, the monitor stays
    blank; instead I hear the monitor repeatedly make a snapping sound,
    similar to that of a light bulb burning out or a firecracker going off.

    Does anyone know what the problem might be and whether it is worth repairing
    or getting it repaired?
    Thanks in advance.
  2. Sounds like a high voltage arc. Probably not worth getting repaired and its
    not advisable for non-trained personnel to work on such a problem.
  3. Jerry G.

    Jerry G. Guest

    This is most likely high voltage arching. This type of fault should be left
    for the very experienced. Some possible causes are a defective HV
    multiplier, defective CRT, and maybe some components on the CRT board that
    deal with the G2 and focus bias.
  4. GD

    GD Guest

    You may have a buildup of dust and dirt within. The High voltage may be
    jumping accross all the dust and dirt. You may try to carefully remove
    the back off the monitor, and with compressed air blow all the dirt and
    dust out of the monitor. You must make sure it is unplugged, and be
    careful because there is probably some High Voltage stored in the
    capacitors. This may work, it has for me in the past, but it does not
    always solve the problem. If it does work, it may also be temporary, and
    it may begin to arc, and snap once again. It is worth a try, but be
    very careful. Good Luck
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