Vizio VP322 Plasma - successfull recap, then dies during 24 hour burn-in

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  • DocStupid
    New Member
    • Dec 2006
    • 1
    • USA
    #1

    Vizio VP322 Plasma - successfull recap, then dies during 24 hour burn-in

    Hi,

    Vizio VP322 Plasma.
    Totally dead, no signs of life.

    2 buldging caps in power supply - 3300uf, 10V, Samwha WB
    The other usual suspects look good.

    I've recapped several of these TVs with success.
    All would light up the VIZEO badge, but not turn on.
    This one is different, totally dead.

    So...
    I replaced the visably bad caps with 2 temporary used caps to check it out.
    (3300uf, 10v Nichicon PW)

    SUCESS! Run it for a couple of hours.



    So lets fix this right...
    Replaced the following caps with Nichicon HE from Digikey:
    C233, C234 - 3300uf, 10v - bulging
    C204, C205 - 1000uf, 25v
    C236 - 1000uf, 10v
    C201 - 47uf, 100v
    C238 - 470uf, 10v

    Note - C204 &C205 - 12.5mm dia instead of 10mm, ordering error by me.
    A bit close to the heatink, but not touching.

    Put it back together (again), and time for 24 hour burn-in.
    It ran for about 8 hours before I went to bed.
    Next morning.... DEAD :-(
    No lights, no clicks, no nothing.



    I think I have a bad mainboard, with a shorted Vstandby line.
    Unplug the mainboard from the power supply,
    I get 2 relay clicks when I plug in AC.
    And get Vstandby = 5.1 volts.
    Plug in the main board, and Vstandby = 0
    Also, no relay clicks when plugging in AC.

    Unplugging/plugging the plasma drive board has no effect on results.
    (dont know what to call this board)



    Any thoughts on why this ran great for over 8 hours, then died?
    Seen this before?

    Thanks
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