Tv remote

You may want to first reboot your cable box by unplugging it from power for 10 seconds and see if there is any change afterwards. If that doesn't work, you may want to try re-pairing the remote to the cable box using these instructions, https://www.cox.com/residential/support/pairing-or-unpairing-the-contour-remote.html

-Brian

If the remote still doesn't work after taking actions recommended by @BrianM, replace the batteries.  If it still doesn't work, take it to a Cox Solution store and replace it.  Don't forget to take your new batteries out first.