Samsung LCD 32" TV, model -le32d550k1w has sound but no picture?

Hi, just wondered if anyone has any idea what the cause of this maybe? Samsung LCD TV has sound but no picture.
Model num - le32d550k1w.
When I switch the tv on the sound is fine, the screen comes on too but is very poorly lit (not enough to see a picture) and has two vertical faint lines down it one either side of the screen. I can see inside the tv the lights that light up the screen are working, I have tried powering down the tv and connecting different devices, disconnecting screen from T con board and reconnecting. All to no avail :(
If anyone has any help or advise on what this maybe would be much appreciated.

Many thanks