Question about Philips 42PF9946 42 in. EDTV-Ready Plasma Television
My Philips 42" Plasma TV brokedown in May 2007, model 42PF9946/98. Philips technician have checked and confirm the faulty PCB is on the Power Supply module If any of you have an old unit which is beyond economical repair, appreciate if you would contact me. I willing to pay for right price for the old unit but provided the faulty part should not be the same like mine. Phua firstname.lastname@example.org 96263023
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Posted on Jan 02, 2017
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
all philips plasma sets have issues with overheating heatsinks.
any heatsink that burns you upon contact is a recipe for disaster.
using cooling fans on these overheating parts will generally provide
great reliability in the long rung.
Posted on Nov 10, 2008
SOURCE: 42 plasma philips
I had a similar problem. You likely have 1 or more bad capacitors on the power supply board. You can easily identify them - they have a raised or rounded appearance on the top instead of being flat. Remove the power supply board and take to electronics repair shop and have them replaced. The capacitors only cost me $4.24 for two. Now mine works fine. The repair man replaced them for free. It took him only 10 minutes to solder them on the board. Easy, cheap fix but manufacturer won't tell you that. I fixed this on 1-02-09. My 2 bad capacitors were "3300uf 10v" and I replaced with "3300uf 16v" but you might be able to replace with "4700uf 35 v" also.
Posted on Jan 03, 2009
I have a Phillips 42FD9954/17S and every time I try to turn it on I also get the power red light blinking and sometimes it will try to turn on with a bunch of clicking noises and it will be green for a while then turn red. What I do and its very weird but works, put a blow dryer on hot and blow it under the tv on the side of the power button for about 10 minutes and it will turn on. I took it apart and there is a heat sink that if i put the blow dryer directly onto it on heat it turns on in less than a minute. Can someone tell me how I can fix this heat sink? I cant take it off. I want to put some thermal compound to see if that works. Give it a try I promise it will work. The Red Light has to be on put the heat on it and then press the power button, if you hear it clicking and green then back to red you are almost there. Keep putting heat on it and it will turn on.
Posted on Mar 31, 2009
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