Which device is connected to the TX9000 AV expansion box for video input? seenagape 10 years ago Which device is connected to the TX9000 AV expansion box for video input? A. presentation (TS4) codec B. collaboration/presentation display C. center (TS1) codec D. built-in video splitter E. left (TS2) and right (TS3) codec ← Previous question Next question →