Question about Philips 42FD9954 42 in. Plasma HDTV

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Have a 42fd9954/17 philips plasma tv; when push pwr button from remote red led will turn green for couple seconds,screen will never come up and led will change from green to flashing red. had this problem when in warranty and they replaced pwr supply. if i replace pwr supply again, i was told that ,after installment need voltage test and adjustment to meed service manual. i can not find any parameters in owner manual. any suggestions? thx.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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pizzaguy3274
  • 4 Answers

SOURCE: 42fd9954

Not a fix, but it got my tv on.
I removed the back and tried the power switch.
I located the relay that was clicking.
I have two blue relays in the middle of my power board.
I placed a hair dryer over the relay for a few minutes.
After four tries of the power switch and it stays on!!!!!
Heat keeps the relay from just clicking off.
I don't know why.
This will at least get the tv on though.

Posted on Apr 12, 2008

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mumma_1
  • 903 Answers

SOURCE: 42" philips plasma

when a television turns off by itself and flashes as you say, it indicates that there is a problem inside the tv. If you keep trying to turn it on you may do more damage. It could be something as simple as a faulty fuse inside. If you have no expierience with electrics I suggest you get it checked out by a professional. I had a similar problem with another tele model and it was the fuse in the back of the tele that needed changing. I did try to this on my own but unfortunatley didn't have the right fuse so i took it to a repair shop and he done it really quickly.

Posted on Oct 23, 2008

  • 1 Answer

SOURCE: 42FD9954 philips plasma TV flashing LED it wont come on

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

  • 1 Answer

SOURCE: Philips Plasma NO LIFE

I had the same problem (with 42FD9954/17S) that when turned on the unit, the green LED turned off and came back to red again some time later. I kept turning it on and once it went to a clicking relay sound and blinking green LED with it. It did that for a while and stayed turned on. I noticed that it is temperature sensitive. Colder the room is more often does it. Used a hair dryer and blown hot air into the unit at the left bottom grills. It helped and started to tun on quicker. Later it has deteriorated so bad that I took it a part and after several ice spraying test showed that on the middle big board (power board) there was an electrolyte condenser went bad. It is the one one which is at the middle, bottom center of the board near the fixing screw. There are two of them (cylindrical objects). The left one was the culprit. However when I fixed it, it turns on immediately but goes blinking red after that. Phillips say it is a static discharge problem. I might blown something when soldering the parts. I don't know what. Any ideas?

Posted on Feb 08, 2009

  • 80 Answers

SOURCE: Power cannot start red led blinking

Check the power board for caps with the tops bulged up. 3300uf 10v.

Posted on Jun 01, 2009

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