Just purchased a Vizio Sv470M HDTV to replace 10 year old crt type tv. Cable box is Explorer 8300HDC. Remote is synergy IV. The remote is programmed for the cable box and the new TV. remote worked fine with old tv and current cable box. Here is the odd problem.
When I have the TV and cable box both powered on the remote will only talk to the TV. Meaning, I lose all remote functionality to control the cable box. When I power off the TV I gain full control of the cable box.
I have tried all possible combinations of turning things on and off. I have reprogrammed the remote several times. Any ideas on what is wrong or what I can do differently? Thanks.