That’s XRE 03090 error, try system refresh by pushing ‘A’ button on Rogers remote controller followed by modem reboot. Simply unplug the modem and plug back after 1 min while keeping the tv powered on. Give about 1 min to the tv after the modem is ba...
Using the “A” button on Rogers remote, choose System Refresh - will take about 15 minutes. When it completes, try to Channel up/ down. If the issue is still there, reboot modem - keep it unplugged for complete minute, do not reboot STB - just the mod...
For the new remote XR15, press and hold Rogers and Mute button together until the LED on remote changes from red to green, followed by 5 digit code. Remote blinks green twice after that.