I have an AV192 in a complete TAG system. The AV192 has all upgrades/ available options save for the video scaler. Yesterday a fault developed which got progressively worse eventually leaving the product unuseable. The fault started within a few minutes of switching it on: initially everything was fine but I could hear an occassional relay switching on/off. Shortly thereafter the rapid relay switching was joined by a rapid flickering of the display which affected the sound. Any ideas about the cause? As I live in Hong Kong, will there be anyone that can repair this here or will I have to send it back to UK?