Can not boot it only diplays android after logo only

kindly assist in solving this , i have this huawei p6-uo6, i have stayed with it for 1 and half years last week 11/8/2015 it failed to boot it only indicates android after displaying the huawei logo , and the display does not disappear til the power goes off, what could be wrong

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 2
crwdns2934285:0crwdne2934285:0