Question about Philips 42FD9954 42 in. Plasma HDTV

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42FD9954 philips plasma TV flashing LED it wont come on

Hello
I have a 42 in plasma TV but when I turn it on the LED light will go green like it will come on then after 7 or 10 seconds it will start flashing orange and it will not turn on

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  • Awsomeone Nov 13, 2008

    to tvjohn



    what do you mean by replace all the electrolityc caps in the power supply?? do you mean the capacetor??? thank you so much

  • Awsomeone Nov 13, 2008

    to tvjohn



    what do you mean by replace all the electrolityc caps in the power supply?? do you mean the capacetor??? thank you so much

  • jorichards6 Dec 04, 2008

    No picture at all. Green light comes on then flashes red - no picture comes on.

  • Anonymous Mar 24, 2014

    replaced blown fuse on main board now when i turn on tv green led comes on screen comes on for 1 sec then tv turns of

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The problem is in the standby power supply. the standby power supply generates the 9 volts and the 5 volts requird by the tv. If you measure the 9 volts source, with only the red light on, the correct voltage is 9 volts. However if the 9 volt measures 6.5 to 7 volts it is too low and the startup relays cannot operate. My set is a model 42FR9954/17S. In this set if capicator, 2603, is heated the voltage climbs to 9 volts and the relays work. If cold air is applied to the capicator the relays fail to operate. Replace capacitor 2503 and the problen is fixed. This capicator is: 47 Ufd, rated @ 450 volts, and is 20%.

Posted on Nov 15, 2008

  • Rick Feb 13, 2012

    Good call. Heating the power board with a hair drier enabled the set to be turned on and function. I replaced capacitor 2503 but hasn't fixed the problem. Any suggestions as to which alternative capacitors might be looked at ?
    (My 42FD9954/ 69C is now 7 years old)

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Start by grabbing a hair dryer and warm up the power supply board.
If the set starts then replace all the electrolityc caps in the power supply.
If this does not cure the problem then check the y sus board and the z sus board.

Posted on Nov 10, 2008

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