Two TVs and remote controls- do not work with remotes (Birkby HD2)

These for some reason no longer work with the remote controls and are now impossible to control without them. Were working well until recently so might be fixable. The TCL has buttons underneath and the Sony on the side the Sony has a small scratch on screen as shown in photo. They are about 31'' corner to corner.
One remote is a big button one suitable for someone with poor dexterity and can be used to connect to TVs using an existing remote. Happy if someone wants to try one TV or remote.
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