YES, you are right. Remote must work with TV. Mine must have been set to send signal to the STB (set top box). Somehow I found the answer among the many others. Reminder, my problem was with MUTE button and with VOL on and off. I got it to WORK. here is how I did it:
1. Press the OK button and the number 2 button together and then release. You see the little red light blink and then go off.
2. Then you use the number keys to enter 9-5-5. I think the red light blinks again.
3. Then press and release the TV (i.e. power) button.
For me, after I did this it worked right away. Good luck!
