Question about Philips 42PF9966 42 in. HD-Ready Plasma Television

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TV turns itself off

TV works fine then suddenly screen and sound go off but green light stays on as if TV still turned on. When press off/on switch it clicks and appears to come back on (but no picture or sound) but goes off again after few secs while red and green lights on front click and alternate every second or so. When TV is unplugged it comes on again normally till the next time! TV seems to turn itself most frequently at commercial breaks/end of programmes. Sometimes does it every 15 minutes, sometimes not for several hours. Does anyone have a possible solution please? TV is less than 18 months old (but out of warranty of course)

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SOURCE: My plasma TV turns itself off and there's nothing I can do to get it come back on...

This is going to sound stupid, but I have a 42" Philips plasma that'd been having the same problem lately. Eventually, I checked the power cord--have you ever noticed that the cord just hangs straight down from the bottom of the set? My guess is that over time, it slowly gets loosened by gravity, just a bit, so you get a fluttery power connection. Anyway, it didn't feel loose, but I pushed the power cord in as hard as I could, and I haven't had a problem since.

Posted on Dec 14, 2007

  • 187 Answers

SOURCE: no picture on my philips 42PF7321D/37

Bad caps in the power supply must be replaced .

Posted on Jul 21, 2009

SOURCE: Hi, I have a Philips model 37PF7321d/37, 37 inch

The power board numbers you need to search for on eBay is 310432847531 or 310432838621 - they are compatible according to Philips.

Posted on Nov 05, 2009

  • 453 Answers

SOURCE: Blinking red light and tv will not turn on.

problem on power supply , u may have 2 bAD capacitor

Posted on Apr 14, 2010

  • 1 Answer

SOURCE: I have a 50" philips plasma , shuts off and blinks red light 2 and 7 times Y main board module problem?

I had a rough go with this problem, but I feel I have some pearls of wisdom on this so please take the time to read the below.

I tried that different cord trick because as stated above, it is a rather universal cord. This did not work for me though, so I reverted to solution #7. Took your advise and ordered the exact capacitors that you stated (I would order 4 since they are $1 and if you break one you can just use another). Since I went through these steps with my dad and didn't bribe him with Makers Mark I can share some different things you want to look out for while making this change if you haven't done this before.

First of all, your going to want to unscrew the entire back of the TV off. It's a shell, so make sure you get all of the screws off (there are some tricky hidden ones so keep your eyes pealed).

After this is done your going to want to locate where the capacitors that are burned out are. There are tons of these things inside, some large, some small. Your going to want to located the mother board (the big circuit board in the middle of the unit, you can see it fairly easily in the picture above). They are located in the middle of the mother board towards the bottom. Mine were fairly easy to locate as they were the only ones bulging on the mother board.

Here is where it gets tricky. You want to unscrew the mother board from the TV itself so it is only connected by the wires that are flowing into the motherboard. These wires unclip however, so detach these wires so you can remove the entire motherboard.

Once you remove the motherboard, your going to need to remove the blown capacitors. The way this is done is to use a sodering iron on the back of the motherboard so it loosens these capacitors so they wiggle out (best to do this with two people, I did it with my dad. One person soders, the other wiggles the capacitors loose.

Once you have them out, make sure to line up the positve and the negative ends of the capacitors (there is a line on the capacitor with a different collor, for instance, my capacitor was navy blue and there was a silver strip along the side of the negative side on the capacitor). If you look close on the motherboard, you should see a positive sign, just make sure it matches the capacitor.

You may run into some trouble with the holes from sodering, because they may close. This is not a problem, you just need to loosen up the holes as you did when you originally removed the first capacitors. Once you soder the holes and open them up, feed the two capacitors into the holes.

Once they are secure into the new mother board your going to need to resoder them into the motherboard with actual soder to close it off. If you are not firmiliar how to do this, seek help. I've sodered some hot water tanks with my dad before but I let him take the reigns on this one as hes done it so many times.

Once you reconnect the wires/motherboard/screws/external shell you should be ready togo. Try plugging it back in before you close everything off though to make sure you did it correctly.

I went through this process with my Dad today, based on the advise above and nothing else. It probably took us about 1:30. Oh, and I repaid him with some Johnny Walker Black, because while Bourbon is fine...this was a Scotch kind of an job.

Best of luck, and I hope this helps a little more on the fine details posted in Solution 7.

Posted on May 16, 2010

  • 19 Answers

SOURCE: tv wont turn on

you may find the fix for your tv on my site

Posted on Nov 29, 2011

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