Hello i have a philips tv 50p8342 the tv will turn on and stay on for
a hour then it will turn off also when the tv is on the power
button will not turn it off but the remote will turn the tv off.The TV blinks twice fast then it will stop then blinks twice again.
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This set has an SSB module, they are notorious for causing the set to fail with strange symptoms like the freezing up you are experiencing. This board needs replaced it is a very small board about the size of a deck of cards, mounted vertically on the left hand side. The cost of this board is usually over $200.00. I have worked on many of these, and one thing you need to be aware of is that i have received new board in that were defective, this was a chronic issue, and if you buy a board make sure you can return it, if the tv begins to have other strange problems most likely that board you purchased is defective as well. This is a big issue with this set including the repeat failures of this board
Sounds like you are tripping your crowbar circuit. This is most commonly caused by one of the Red Green or Blue brightness adjustments, adjusted too high. The crowbar circuit protects your high voltage guns from getting damaged. I know this because I just did this myself. My adjustments were behind the lower rear panel in a small box screwed to the chassis. There are 6 tuning pots on mine. 3 for focus of the RGB and 3 for brightness of the RGB. The focus ones didn't seem to have any effect on the crowbar circuit. However, by turning the brightness down on each of the RGB pots I could get the T.V. to stay on indefinately.
Try the power supply. Look on the one in your TV for the part number ; mine is PH3501705441. I ordered one from partstore.com and it was less than $60 shipped. Hope this helps, mine works fine now........and I have a 50P8342 chassis PTV 916
My tv was doing some of the same type things I touch one of the manual buttons ont tv and the channel would change or the volume would go up or down. I changed the control board behind the manual buttons on the face of the tv and now it works fine with or without the remote.
the part no. is 313501707611 go to sears web site type in this number and order it. this part will come up as 60P8342 but thats ok becouse the 50P8342 and the 60P8342 use the same part number I know I have both models and changed them both using the same part and part number.