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Philips 42" plasma almost comes on by itself ? (Otherwise works fine)

Discussion in 'Electronic Repair' started by Rodo, Jul 7, 2007.

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  1. Rodo

    Rodo Guest

    Hi all,

    I bought this Philips plasma TV from Costco (Model# 42PF9431D/37). It is on
    the wall in my bedroom. I noticed that it would click as if I turned it on
    and after 10 seconds click again like if I turned it off when the TV is off.
    This happens like once or twice a day. Because it has done it at night when
    the room is completely dark, I can see the screen lights up a bit. It never
    comes completely on when it is doing this. Otherwise the TV works fine, no
    video or audio problems at all. After a few times of these I decided to take
    it back to Costco and got another (same model no.). Guess what happened? ...
    I got the same problem again :-(. So I decided to do some things to rule out
    the power outlet:

    I plugged it into an extension and into another outlet (away from my
    bedroom). No change.
    I plugged it into a UPS. No change
    I cover the IR sensor in front of the TV. No change.

    I finally called Philips and they referred me to a repair center. I just got
    it back after they had it for two month. The receipt shows they changed
    something called PSU and SSB. Here is the depressing part ... NO CHANGE!.

    I called my credit card company and I can do something with them to return
    it but I really like the TV. Other than this click on, 10 secs later click
    off, it really is a nice set. Not to mention that the installation is
    already done on the wall. Anyway ...Can anyone suggest what else I can check
    in my place that may be causing this TV to do this ?

    Thanks a bunch everyone... comments/suggestions welcome.
  2. James Sweet

    James Sweet Guest

    Try the easy thing first, put some black electrical tape over the IR sensor
    on the set and see if it still happens.

    If all else fails, just take it back to Costco, they have an outstanding
    return policy.
  3. Charles

    Charles Guest

    Is there a programmable wake-up mode (like a clock radio). Is there any
    other programmable feature that might cause this?

    Do you have ghosts? Just kidding, as I know how frustrating these things
    can be.
  4. Art

    Art Guest

    Question? Did anyone check if NAP has a software upgrade for the specific
    device??? And then install it?????
  5. Rodo

    Rodo Guest

    I checked their web site and I'm running the latest.

  6. Rodo

    Rodo Guest

    There is a setting for the time but it looks like it is only to display it
    on the screen, I can't find a programmable "On" feature and remember that it
    doesn't come all the way on. The screen gets slightly bright for the 10 secs
    then it goes dark after the second click. Effectively turning it off. One
    thing I forgot to mention is that the front green LED that it is on when the
    TV is actually on does not turn on during the 10 secs glitch.

  7. Ken Weitzel

    Ken Weitzel Guest


    Don't know your set; heck I'm so old I don't know much of
    anything anymore :)

    Nevertheless, can't help wondering if your set doesn't
    have an auto off menu setting for a certain time of day?
    (for us old folks who fall asleep on the couch.) And if so,
    it isn't *slightly* waking up so as to turn itself off?

    Take care.

  8. Meat Plow

    Meat Plow Guest

    Call Ghostbusters.
  9. Art

    Art Guest

    Check with Philips, ask if there have been strange problems originating in
    their SSB (Small Signal Board), I think they refer to it as an image board
  10. bz

    bz Guest

    Are you on cable, dish, or using off the air broadcast?

    I think that some cable systems periodically send a signal over the cable
    to disable unauthorized [the authorization to receive their signals has
    expired -- the bill hasn't been paid] decoder devices.

    Could such a signal be activating some of the electronics in your set?

    Have you tried disconnecting all signal inputs at night to see if it stops


    please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
    infinite set.

  11. Rodo

    Rodo Guest

    I haven't tried this before. I just turn the off timer to 180 mins (the
    max). It was set to zero ... I haven't been home to hear anything but if it
    did anything I should know before monday. I'll try your suggestion next if
    this fails.


  12. jango2

    jango2 Guest

    Could this have anything to do with "burn in mode"?
  13. Rodo

    Rodo Guest

    Sorry, I don't understand what you mean. Could you explain further please ?

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