Change the batteries
2) clean the contacts batteries with contacts cleaner
3) tight the springs contacts with pliers for better contacts
4) resolder the wires contacts batteries.
5) open the remote control and clean the keypads swithc from oxide, bad contacts, or open contacts, they transmitt infrared signal to the receiver.
6) or you must to go the repair shop TV for fix it.
God bless you. see the diagram block
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