why is it, I need to reboot TV box everytime i Power on the TV??
I would start by removing the Comcast remote to control both cable-box and television. Use the Comcast remote to turn on and control cable-box. Turn it on first. Then used the television remote to turn on the television. Make sure the television is correctly connected to the cable-box and that the right source on on tv is selected to match source you choose on television's many connection options.