Make sure there are no line of sight obstructions between the remote and the IR receiver in the TV (normally located @ either bottom corner of the TV). Wipe the IR receiver lens/cover with a clean cloth and ensure your batteries are appropriate and in good condition in the remote. The TV itself may need a firmware update depending if the TV is designed in such a way. Connect your TV to your internet as per manufacturers instructions and perform the update procedure. Also look your TV up on the internet to see if there is another cause that is related to a certain brand of TV or if there is an issue with the digital code from one of the local broadcasting networks. There has been several occasions where a broadcaster has changed their signal code and it has affected certain brands of TV functionality.
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Make sure there are no line of sight obstructions between the remote and the IR receiver in the TV (normally located @ either bottom corner of the TV). Wipe the IR receiver lens/cover with a clean cloth and ensure your batteries are appropriate and in good condition in the remote. The TV itself may need a firmware update depending if the TV is designed in such a way. Connect your TV to your internet as per manufacturers instructions and perform the update procedure. Also look your TV up on the internet to see if there is another cause that is related to a certain brand of TV or if there is an issue with the digital code from one of the local broadcasting networks. There has been several occasions where a broadcaster has changed their signal code and it has affected certain brands of TV functionality.