Hello, I cannot change the volume on the TV via the Comcast Universal remote nor the Vizio remote. I have tried all 5-digit universal codes and even tried to globally unlock/lock the device. Not sure if the global lock/unlock has affected this issue? The universal remote changes the channel...

Is there any way to change the remote codes on the Vizio SV470M or SV420M? My brother and his roommates just bought one of each and they are set up right next to each other. Both TVs use the same remotes so they can't control them individually. Are there any settings to set one to use a...