Hooking up a sound bar to a 42'' flat screen panasonic can't get any sound from sound bar.

I had the same problem, no sound from tv to the sound bar. I hooked up the output for sound from the sound source, your cable tv box or satellite receiver and ran it to the sound bar, and then received sound.

Follow the instructions that came with it, if lost l would Google the model number of the sound bar to locate the manual for use.

The aftermarket audio/video cannot allow you hook your Tv and Dolbys stereos becauses of incompatibility issues.

If you tried hooking each unit up one at a time without the box and they work either a setting on that box is wrong or there is a problem with the box.

Make sure the cable is hooked up then press ok on your remote (or enter). If you have your tv hooked up a different way (like hdmi) just change the tv source to the correct one.

The problem may be due to 60hz (cps) power line interference making its way into the TV either through the cables that are connected to the TV or through the AC power wire. A good test is to unhook everything and connect a VCR to the TV and play a movie to see how the TV screen looks. If the TV screen doesn't show the lines when playing a movie, the problem is coming into the TV from one of the cables. Try hooking up one item at a time until the noise bars show up, when they do that cable or device is the cause of the noise bars.

it might be coming from the actual audio/video source. try hooking up a dvd player or gaming system and see if it still does it.

I have a brand new Panasonic 42" tv, once in a while the sound fades out and then fades back in right away. I have it hooked up to a high def cable box with high def cable.

try this, can't hurt!
http://www.avforums.com/forums/plasma-televisions/462873-black-line-fault-hyundai-hpt4240-fixed.html

st