Picture Channels 2 to 7 plus 15 and 21 are snowy but no sound. All the other channels are fine. I plugged the cable line directly into the TV and same problem. Plug the same cable line into another TV and I get all the channels. I have tried everything in the menu. Any idea? Thanks

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1,139 Answers

Ther is a test you could do is you had the proper equipment, and that would be to inject a know good RF signal into the tunner F connector and chech tha point where the RF/IF is converted to audio and video, to determine if the proble is a bad tuner or not. The equipment is a VA62A Universal Video Analyzer. Its a great piece of equipment for this type of work. another thing you can do is get an RF Modulator from Radio shack and input a video and audio signal in to it and set it to channel 3 and connect the F connector to the TVs F connector. The set the TV to channel 3 you should see the picture and hear sound in channel 3. The VA62A is best because you can set it to emulate all of your channels from 1-87 standard TV and Cable TV. In any event a test needs to be run to see if the tunner is at fault.

Posted on Sep 08, 2007

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