Whenever I use a remote for another device, it interferes with the TV and changes channels.
I have read other threads in this forum where the IR on the tv blocks other devices from working, however this isn't the problem I have. I have tried remotes from 3 different DVD players and they all cause the tv to change channels.
As such I can't even use a dvd player by remote with the tv. I have tried putting pieces of paper over the IR sensor on the tv, but this has made no difference. The TV remote doesn't seem to affect the other devices.
No I don't believe this TV had HDMI CEC, I can't see any options for it.
It doesn't make a difference, if the other devices are off, the remotes interact with the TV, so it seems they are using the same frequency. If I press a particular button on the dvd remote, it will always have the same effect of the TV such as changing it to channel 2..