Remote Control Issues

Out of nowhere the remote to HD TV began providing Severely Limited Functions. Turns TV on/off, has volume control, mute works & changes channels up/down manually. The first 3 three buttons at the  top of remote. Voice only turns channel but only by asking for network by name, nothing else. I can't turn channels by entering station numbers, No Access to Guide, Saved/Recorded, Last Viewed, On Demand, Up/Down, OK button, etc.  Remote was Reset & batteries good. Green lights blink. Please advise. Thanks.