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Panasonic TC-P50U2 - 1 blink

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    Panasonic TC-P50U2 - 1 blink

    A friend of mine sold me his non functional Panasonic TC-P50U2 as is. The TV occasionally work when powered on, but most of the time the set would power on for a couple seconds, and then blink the light once (and repeating that indefinitely).

    Based on the service manual I've seen, this code means the A board needs to be replaced. However I can't get over the fact that the TV does in fact decide to work every so often (albeit rarely) which tells me that a single component may be on the edge of failure.

    Are there any tests I should try to locate a failed/failing component on the board? I'm no stranger to electronics and around a decade ago I used to work in TV repair, but rarely at the component level. I'm excellent with a soldering iron and have access to quite a bit of electrical engineering equipment (and a couple electrical engineers) if it comes down to it.

    #2
    Re: Panasonic TC-P50U2 - 1 blink

    if your not new to this then you should know to start wih a visual inspection.
    looking for bad soldering or leaking caps or any signs of exessive heat.

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      #3
      Re: Panasonic TC-P50U2 - 1 blink

      I already have. Caps all look fine, and no scorch marks or signs of thermal stress. I didn't pull out a magnifying glass quite yet but all the solder joints look sound.

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        #4
        Re: Panasonic TC-P50U2 - 1 blink

        1 blink typically A board fault, probably BGA failure. (Like Xbox 360 red-ring, PS3 yellow-light, etc.)
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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          #5
          Re: Panasonic TC-P50U2 - 1 blink

          On the suggestion of an EE I work with, I pressed down on each of the BGA ICs while powering on the TV and didn't get different results. I may give him the board to re flow the solder anyways.

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