after pressing start button only show Lenovo logo then laptop cnt boot

When I start my laptop it's not booting only Lenovo logo shows in display then show black display and stoppable cursor..

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

crwdns2934109:0crwdne2934109:0

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