Display indicates music playing but no sound.

Ipod 4th gen worked fine up until now. Checked jack connection, volume control and tried 2 sets of headphones that know work. Display shows song playing but no sound. Any suggestions?

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

crwdns2934109:0crwdne2934109:0

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