Question about Philips TP2785C 27" TV

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Vertical interference and black/red boxes appearing on my Philips

Hi, my 29PT6361 Philips Tv has started intermittently going into vertical spasm - sometimes for a second - other times for a minute - prior to this happening there appears to be little boxes of red and black appearing on the screen - or sometimes on their own. If you could give me an idea of what could be wrong I would be most grateful before I throw something at it!! Thankyou so much

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  • jvntak Jun 03, 2009

    Thankyou for that - it's a funny thing that when we stamp in front of the tv it corrects itself - that made us think it may be an aerial connection problem?

  • jvntak Jun 03, 2009

    The lines are actually horizontal but travelling vertically up and down the screen with the black & white squares (pixels I suppose) being intermittent prior to the vertically moving lines. Why is that when we jump in front of the tv it all stops and the picture is perfect?

  • jvntak Jun 03, 2009

    Hi, yes I have disconnected dvd/vcr and set top box and the tv is still doing the same thing.
    Just watched a video taped this afternoon and the sound is now disappearing intermittently.
    Is that what usually happens with the high voltage capacitor problem?


  • jvntak Jun 04, 2009

    Thankyou for your comments! Yes it still does the same thing even when dvd/vcr is disconnected and set top box. Yesterday we taped a show and the sound has disappeared on half the tape - would you think that would happen with the high voltage problem as well?

  • jvntak Jun 07, 2009

    Thankyou - that sounds reasonable as it certainly looks like some sort of electrical interference problem - as yesterday it hardly occurred at all - would it be someone in the local area perhaps using some electrical machinery?

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If you have a amature radio operator or tv station transmittor near you this will most likly be the problem ,your reception may be TOO good.if it is a older style check for hold knobs on the back.if all else fails try a standard antenna on reguler tv if it works this way get with your tv provider and tell them yuor situation.they should fix it for you.hope this helped.

Posted on Jun 07, 2009

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Www.p4c.philips.com/files/t/tp2785c/tp2785c_dfu_aen.pdf -

Posted on Jun 04, 2009

  • mohammed marika thambi
    mohammed marika thambi Jun 04, 2009

    What is picture like if you change screen size to 4-3 is this picture
    size ok & fault only shows in the wide screen formats.

  • mohammed marika thambi
    mohammed marika thambi Jun 04, 2009

    it is due to poor focusing
    please check
    1 set with focus control fitted on flyback transformer,
    2 check focus control wire comes to crt base is loose or some foreign material deposited on it.
    3 crt base loose contact.
    4 if tv is old then there is a possibility of crt is getting weak.
    if you are not a technical person do not open set as tv has very high voltage inside.
    hope this will help.


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Try keeping the tv off for a few days so it can rest then try to turn it on again if it still does that try going to the manual for any hints

Posted on Jun 03, 2009

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Sounds like the high voltage line is rising. I have seen a few sets,
including Philips, where the blank screen seems to bring up retrace
lines and the like. I'd replace any high voltage capacitors you see -
a few may be bulging or showing their silver after the coloured label
has shrunk with heat.

Incidentally, are symptoms the same with and without a device
connected to the input? Maybe the interruption of the channel change
or absence of any sync signal is producing some problem in the Line
output drive / stage.

Posted on Jun 03, 2009

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This is central video processor problem. It obviously starts behaving like that after some time as it getting warmer.
You would need to contact TV manufacturer for service if TV is still in warranty, otherwise repair would be rather costly.

Posted on Jun 03, 2009

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