try pointing remote controler to a phone or a pc camera and on screen you will or wont see the flashing of diode, if it flashes it's your tv sensor, if it's not flashing open it and cross the black lines under the rubber buttons with graphite pencil.
Danny
October 2013
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix televisions.