Tv will not turn on. Makes on going clicking sound only.

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

Could be shorted out and needs check in your power surge could be faulty and you might need to check it at a different plug

Power supply board is dead.Replaced the power supply board,that the board where the power a/c cord go into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Maybe the antenna that you are using is not picking up sound from the channels. It could also be the cable. If it makes a humming noise, it means that the speakers are getting electric current and that they SHOULD be okay. It also could be your tuner. Maybe check it all out at some tech place like best buy. Those guys can help

Check the inverter on the sides of the TV. This sounds like the inverter is going bad and that's the reason why you have sound but not picture.

Possibly the power supply circuit board.

power board is bad if it doesnt power up -- the red flashing lights mean that you need to upgrade the software-- you can get a new software upgrade on the website for philips --- use a thumb drive to install it into the television

Rest the tv by unplugging it from the wall for a hour. If the picture is still gone replace the small signal board.