Question about Philips 42PF9630A 42 in. Plasma Television

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Screen Problem After watching my Samsung HP-R4262 plasma tv for 30 minutes or so half the screen goes black from the bottom up.  Once it starts it continues to do that intermittently.  I've had the tv for 13 months. After watching my Philips 42 inch plasma tv for awhile, i have two problems: The bottom half of the screen goes black. Also, the sound goes out every once in awhile and we have to shut off and turn on again. Need to know how this can be fixed? I've only had this tv for a couple of years and don't want to spend on another one!

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  • gysgt2u1 Feb 24, 2009

    Praky. Would replacing the YB upper/Lower fix this? Or should I replace all three YBU/L and Y-main? I already took back off set and replaced faulty caps on PSB. Tv worked fantastic for 3 days and now It only shows pic on top with horizontal white lines and bottom half is stary/colorful snow and vertical lines. Is this bad buffer or is this a dry joint? Tv was mounted back on wall.

    Any advice....

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Hi....Your tv picture is managed by several boards, the two specific ones are the ysus and the xsus. The Y controlls the horizontal pixelation and the X the verticle, if you are having horizontal problems then its the Ysus thats faulty, on this particular set, the Ysus board has two accompaning buffers that are particularly troublesome. I've had more than one of these sets in the shop recently with the same ailment.Sounds like your buffers are starting to go out. The screen is split horizontally by the two long skinny buffers attatched to the Y main, if the bottom one has one leg in the grave you'll be getting a partially black screen or no picture at all. The colored lines running through the screen are more typical of a failing buffer. Are you interested in taking this set apart and putting a couple hundred into fixing it?  When buffers go they usually take the Y main too. Worse case scenario you're gonna be out about $350 dollars to fix it yourself. Best case, a ribbon is loose on the bottom buffer and with a dismantle you'll be able to connect it again..

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Posted on Feb 12, 2009

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