Why does my Direct TV remote control turn the tv on but not off?

Answer 1

If it is the white one with the red, green, yellow and blue buttons in the center, it is refurbished.

The one for my living room controls the TV and the sound, but the "Previous" and several other buttons don't work.

The one in the bedroom won't control the TV, though it's programmed to do so.

Call DTV and they will send you 2 more for a price. Tell them you only need to have one replaced and they will send it to you for free.

Answer 2

Try to program it using another "Code" for your TV.
Many TV manufacturers use different codes for different models.