I purchased a 32 inch RCA LCD HDTV and after 6 months it had major problems, could not change channels, etc. sent it back received replacement today and after having it on for less than 2 hours the sound is being interupted it comes in and out. I have it connected with HDMI cable. What can I do to get uninterrupted sound?

Disconnect the HDMI, and try connecting the device using standard audio and video cables (i.e. Red, White and Yellow RCA's).

If you still get interrupted sound, then its probably the HDMI connection, since it carries audio and video in the same cable. Try another cable.