If successful, the Remote Mode button will flash twice.
Open the back. If you see white or green crusty residue, clean it with a q-tip dipped in white vinegar, then dry it thoroughly. Insert . The red LED at the top should flash once. onkyo rc-799m remote manual
Onkyo RC-799M Remote Controller Document Type: User Instruction & Setup Guide Target Audience: Owners of Onkyo Home Theater Systems (HT-RC**, HT-S**, TX-SR** series) If successful, the Remote Mode button will flash twice
Power
Simultaneously press and hold the button (e.g., BD/DVD, CBL/SAT) and the DISPLAY button for about 3 seconds until the button stays lit. onkyo rc-799m remote manual