remote not working at all

My remote will not do anything change channels, volume etc.  A red light appears when I press any button.  The t.v. will turn on manual and is set to the HDMI 3 channel and a screen saver shows with varying notices, but my remote control will not work.  Do you have a fix for this?  I tried different batteries and unplugging the modem and t.v. several times and nothing seems to work.