Tv was slow to turn on, now it shows green lite then it goes of and red light flashes 4 times stops and repeats flashing. the tv doesen't have a picture when the green light is on for a few seconds.

Hi,

It could be just a few bad capacitors on the power supply, if you want to attempt the repair yourself you can do a visual of the power board caps will appear swollen on top.

The ones you are looking for are located almost center bottom of the power board,

With the back removed you will see a few circuit boards the upper one (ac cord runs to it through a small board) is the power supply, it has a lot of capacitors on it (cylindrical standing straight up soldered in and marked on the sides with the positive/negative sides and MF and Volts values)

Philips uses 2200Mfd or 3300mfd at 35Volts rating capacitors, they cost about $1-$2 each

Try replacing the capacitor that are bulged on top ones .
The power board and back unscrew with a torx bit and screwdriver size 10 and 15 , if you do not know how to desolder and resolder then do not attempt this as you may damage the TV more than fix it.
We do not recommend do it yourself, but depending on your knowledge and technical ability you may be able to.
You can replace the whole power supply, but Philips has a few versions in their sets and some so called replacements won't fit due to cable location (sockets) being in a different spot.
If there is a blinking red light on the TV count the blinks,if it still blinks after replacing the swollen cap this would indicate a bad buffer board , check the capacitors by looking for the swollen tops I hope thats all it is
Here is Philips Phone # 1-888-744-5477 in case you need it for exact part

Please leave me comment, if you need further assistance
RNJ VINODKUMAR