For some reason my TV sound processer will drop when I change channels or audio input. For example, it will drop when I switch channels on cable or I switch to the blu-ray player. Sometimes it comes back on and sometimes it doesn't. I haven't tried with true internal speakers.
Also the sound goes in a repeating sound and then out when I switch the sound from lets say standard to music.
I am wondering if if the sound processor is overheating. I put a fan behind it and that might be better. I notice that the TV is working at best after a long time off. Plus the startup of the TV is slow after the I turn off and turn on for a short stint, but fast when its down for a while.