I had the same problem and it was the power supply board,but I replaced it myself and only spent about $140.00 for the part and 2 day shipping . It was easy just pull the back cover off and there are about 8 small screws that hold it on and like 6 connectors that's it. Also ShopJimmy.com was the place for parts on these T.V.'s.
how can solicit the parts what number it is?
mine did the exact same thing i could have written the question myself but thanks to other peoples response it only costed 38 dollars to repair my problem. I had 2 blown capacitors on my power supply board so we removed the board, took it to a repair center they removed the blown capacitors and sodered two back on the capacitors run from 1.50 to 4,00 and they charged us 20 for labor but it bets 140 and waitin days it too a few hrs and we had it repaired and back on by 3pm today, Checkin the capacitors is as easy ad checkin a blown fuse you just have to look for the puffed up on that looks like its burnt on the end,
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SOURCE: I have a philips 42"
here is the manual click on the kid rate the star and download will start
http://safemanuals.com/user-guide-instructions-owner-manual/PHILIPS/42PFL5332D-37-_S
SOURCE: Power Problems - won't turn on
first thing to do is determine if there is a blink code as that gives a direction for t/s. regardless, what you should do first is offload the y main and x main sustain boards from power supply one at a time as there is a common issue where these boards can cause load on power supply and if voltages come up with either one offloaded that board should be replaced before proceeding. if y main is the issue there is an upper and lower buffer board to left of that board and also should be replaced at same time as 3 boards complete a circuit and replacing one could cause damage to others.
SOURCE: Power Problem
usually blink code on front gives direction but first thing to do would be to determine if surrounding sustain boards are causing draw on power supply by disconnecting them one at a time from power supply. y is on left looking from back and x is on right looking from back. if led goes solid with either board disconnected check supply voltages and if come up and stay up replace that board. if no change then you would need to verify vs on command coming from logic main to power supply. should be labeled on power supply connector and should be 3 volts. if present replace power supply if not present verify if logic main board sitting underneath signal board has one solid and one blinking led on if verifying normal operation and if so replace small signal board
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