Backlit not working on buttons

It's there a way to fix the backlit for the buttons on the Logitech Harmony 650 Remote. The buttons light up on one of my remotes but not the other. Thanks!!!

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0