How to install a new ir circut board on my 47 " philips flat screen tv

SOURCE: 47'' philips flat screen does not install channels

Go directly to theback of the set via the back RCA connectors(yellow, red, white) or component video, and turn set on Aux. If it works the tuner is Messed!

SOURCE: screen is dimmed and flashing

It's the #1 plaguing issue with flat panel TVs in all brands. If the red light on the TV is blinking when this happens, It should be an error trouble code.
The most common thing to go out on flat panel TVs is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. The Backlight Board supplies power to the screen in different sections. With a 47" screen, it maybe divided into 10 to 12 sections. But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptoms.

You have a few choices:
1. You can try leaving the TV unplugged for 30 minutes so the TV can reset itself.
2. If by chance the TV is still under warranty, go that route.
3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you red light blinking codes, circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.
4. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.

I hope I shed some light on the subject for you.

SOURCE: need codes for Philips flat screen TV model #27PT6441/37 in

U recieved the propeer code from a nother direcTV provideer in my area. It worked when others did not.

SOURCE: flat screen tv problem

42PF7320A: 7 blinks is missing 8.6VDC from supply -- connector CN-1M46, pin 3 (out of 11 pins), goes from power supply to main/input board.

SOURCE: Philips 47PFL3603D LCD TV -

Hi,
There could be many reasons like IR pins not soldered properly, it is not getting +B supply or IR output signal is blocked, buffer transistor on same board is bad etc etc
Replacement IR Board is available for $6 at Encompass.com so I would suggest to replace complete board instead of IR Sensor.
Hope these info will help you.
Thanks.