I have a pretty basic system that connects my LCD flat screen tv, cable box/dvr & dvd player to a home theater system. The sound works fine when using the tv or cable box, but when I switch to DVD the sound is slightly ahead of the picture. If I turn off the ht, the sound coming from the tv is fine with the dvd. Used a variety of cords (coaxial & rca) and have used different dvd players, all with the same problem. I've also used other input sources on the HT other than dvd, including the game & line in, and it still has the problem. Any suggestions?