"Function Not Available" error on LG 47LG50 LCD TV

messages are coming from channel provider it is their problem not in your tv.

The function you't selected is not compactable with the TV software.

After use Tv will not turn on

Tv will not turn on after previously being use. We will use the tv for a period of time turn it off and come back to it later in the day or night and the tv will not power on. The flashing red light on the bottom right corner will flash but it will not kick over to the blue light as it does when the tv is acting normal. Now we will wait an hour or two and the tv will turn on and work but it just starts the cycle all over again. The tv is not hot or warm or anything and does not make a noise. What can I do to fix this?
Category: I own this product
Interested in: Troubleshooting
ASKED 1 YEAR AGO User Name:
Anonymous
West Palm Beach, FL, USA
ON 47LG50 0out of 0found this question helpful. 1 ANSWER
We regret the trouble you have experienced with this television. There does seem to be a problem with the Power Supply, or one of the related components of this TV. The unit will likely require service. To make service arrangements, you may either contact our Customer Interactive Center at 800-243-0000, or you can check our Repair Provider Lookup on our website, athttp://www.lg.com/us/support/repair....

From this link.
Looking for Answers about LG Electronics 47LG50

There is nothing to worry about trying it..,. if you dont' get rid of that message, you can plug that board back in.

The solution for the problem is to replace the control PCB. The PCB is the printed circuit board that controls the volume, channel and menu buttons.

These parts can be found and bought from Sears parts direct.

A break down of the cabinet parts can be found here.

We have the same exact problem! Were you able to find a solution?

What kind of the connector for the sound are you trying to use? The TV has RCA audio outputs (Red and White RCA) and also optical out put for digital sound output.
http://reviews.cnet.com/flat-panel-tvs/lg-47lg50/4507-6482_7-32915929.html

User manual download: http://www.lg.com/us/tv-audio-video/televisions/LG-lcd-tv-47LG50.jsp

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

www.lg.com/us/tv-audio-video/pdf/47LG50_spec_sheet.pdf
http://elektrotanya.com/lg_lcd_tv_la84a_mfl41370007_47lg50-ua.pdf/download.html
Above user manual top, below is your service manual, perform the troubleshooting procedures and you should be able to localise your problem.

could be one of the boards that you have

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.