1) replace the batteries by new one alkalines
2) clean the contacts batteries very wells
3) retight the springs contacts with pliers, for better contacts.
4) try again, reset the code.
5) open the remote control and clean the keypads with contacts cleaner for diryt, dust, and oxide.
6) resolder all points from board rremote
7) if this not work, you must go to the repair shop TV for fix it.
8) the SYSCOM can be defective. remember they send I.R emission.
God bless you
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