SANYO TV- Model AVM-20MB

[wency]

Hello! anybody there who had tip for for this TV problem? sound and picture appear & disappear when tuned in to a station. when i used an AV signal from a DVD Player, sound is quite normal. I suspected an IC # LB1238AN which causes the problem but i want to be sure if this is it.
A great help also if anyone provides me a schematic diagram cause i understand a little about electronics, any help is highly appreciated. THANKS!

wency

[cory]

if your pucture and sound cuts out on cable and not av inputs,you have a tuner problem.try removing and resoldering tuner,if not replace.tuner has coax connector attached to it.