I need some help with a frustrating problem. I have just taken delivery of a TH 37PW7BX plasma display screen. This is being used with an SAXR45 AV control receiver and DVD S75 DVD/CD player. A Bose 5.1 surround speaker system is used. TV signals come from a TU-CT30 digital converter box. The converter box and DVD player feed picture signals directly into the disply screen by individual SCART leads to two SCART sockets as reccomended by my dealer. Sound output from the receiver is fed into the receiver using twin phono plugs, the optical output is used from the DVD/CD player. The problem which I am experiencing is sound synchronisation on the display, which was never a problem on the CRT which it now replaces. On some digital tv sources it runs out to the point where watching speech is totally disconcerting, but seems worse on some channels than others. At first I thought that this was a reception problem, but notice that the same problem plagues my DVDs from time to time - some scenes being worse than others, which spoils the whole experience. No mention is made of any potential problems in either the product catalogue or in the instruction book - please can you advise me what to do in order to sort this problem out?