Okay so here's my problem,
the tv is turned on and no picture but sound works. The av inputs work, can watch dvd's no problem but no cable, cable is directly hooked up. I'm wondering if its the cable rf connector on the back of the tv or is it something inturnaly that can be fixed, expensive?
Do you have just a blank picture? If it is, the tuner or the tuner controller and / or PLL circuit is bad. This is not going to be a quick fix, as you will need to troubleshoot this problem to find out and make sure the tuner or the circuitry is defective. In a rare case I have also seen the input selector IC and or circuit cause a proble such as this. There are no user replaceable parts inside this TV set and should be worked by a trained tech, as there is alot of high voltage inside this thing. Good Luck and please keep us informed of your progress with this repair.