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Hyundai HPT-4240 42"Plasma tv

Discussion in 'Electronic Repair' started by bluenose41, May 20, 2007.

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  1. bluenose41

    bluenose41 Guest

    I am hoping somone can help me with a problem that I am having with my
    Television.
    I have a Hyundai 42" Plasma TV , Model no:- HPT-4240.
    Over the last few weeks I have been getting a Black band down the
    screen running from top of the screen straight down to the bottom. The
    band is approx one and three quarters inch thick.The line is not
    always there all of the time, sometimes it is on the screen for hours
    then suddenly disappears giving me a normal picture.

    The band starts roughly eleven and a half inches from the left hand
    side of the screen and obviously blocks out any
    image behind it.I have the screen wall mounted and it is not near any
    kind of heat source.
    I have a sky box connected to it and have also replaced the box with
    another box that i have upstairs connected to a small tv in my room.

    Can someone give me any ideas or solution?
    Help!

    Bluenose41.
     
  2. JANA

    JANA Guest

    This type of problem can be either in the display panel itself, or the
    matrix processing. The service centre will do board swapping to fix the
    problem. They don't fix these at the component level, unless the fault is
    very simple. If the fault is in the display itself, then the cost of
    servicing would be not feasible. After the board swap, there may be some
    adjustments do be done.

    You should find out who the authorized service rep for your TV set is, and
    let them do a proper estimate for you.

    --

    JANA
    _____


    I am hoping somone can help me with a problem that I am having with my
    Television.
    I have a Hyundai 42" Plasma TV , Model no:- HPT-4240.
    Over the last few weeks I have been getting a Black band down the
    screen running from top of the screen straight down to the bottom. The
    band is approx one and three quarters inch thick.The line is not
    always there all of the time, sometimes it is on the screen for hours
    then suddenly disappears giving me a normal picture.

    The band starts roughly eleven and a half inches from the left hand
    side of the screen and obviously blocks out any
    image behind it.I have the screen wall mounted and it is not near any
    kind of heat source.
    I have a sky box connected to it and have also replaced the box with
    another box that i have upstairs connected to a small tv in my room.

    Can someone give me any ideas or solution?
    Help!

    Bluenose41.
     
  3. Jamie

    Jamie Guest

    no component level debugging and repairs?, in other words, they're
    garage mechanics working on the ignition system in the dark!
     
  4. Guest

    Hi,

    Did you ever get any suggestions?

    I've got a Hyundai hpt-4240? plasma screen TV. It's turning on, and
    you hear it click go to power up, the light goes green, then it kills
    power to the screen and the light goes red and stays on.

    I'm getting no sound either, makes me wonder if it's a power supply
    problem perhaps?

    Any ideas/info greatly appreciated.

    Elmo
     
  5. Guest

    Hi!
    I am hoping somone can help me with a problem that I am having with my
    Hyundai 42" Plasma TV, Model no. HPT-4240.
     
  6. Marcus

    Marcus Guest

  7. Elmo, this is due to the power supply shutting down after detecting
    abnormality in the output voltages.It takes about 6/7 seconds after going
    Green to shut down.

    You need to put a meter on the VS supply and measure for approx 190Volts DC
    while the Green light is on. Chances are this supply will not be present.

    There's currently a replacement board up on UK Ebay at the moment (Item
    number: 330124441705), alternatively your old board could be repaired.


    With regards the black vertical band problem, i have found that the best way
    to check this is to place a multimeter, switched to low ohms range across
    the four 10 ohm resistors which are on the flexible cable which is bonded to
    the plasma panel (you have to remove the metal bracket and cable from its
    connector as shown in the article mentioned previously
    http://www.avforums.com/forums/showthread.php?t=462873&highlight=hyundai )

    You should read 10 ohms or thereabouts if you are lucky and then just do a
    continuity check between the resistors and the connector strip. If you are
    unlucky, like my last repair job , you will geta high reading (5k in my
    case) which means the black driver chip which is bonded to the flexi
    connector is defective and the panel is basically junk.

    Regards


    Graham
     
  8. Quite likely. For example, I'm fixing a colleague's LGE42V5 42"
    plasma panel, same symptoms.

    It uses the DGK-420W power supply (which I believe is used
    by various plasma sellers.) There's a green LED on this PSU
    board which blinks (1 long and 6(?) short blinks, repeating) when
    the Vs supply fails. This PSU is known for blowing the blue 1uF 630V
    capacitors in the Vs section, they appear to be driven pretty hard
    with full load power through them. One capacitor is entirely open
    circuit on mine (and slightly bulged when examined after removal).

    Mike.
     
  9. Guest

    do you still need help with this set?

     
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