Default Help for not turning on after unlocking bootloader...

hi, i`ve tried to unlock bootloader , first i rooted it by clicking the icon of flashtool named "Root Device", and then when rooting is successfully done, i clicked the icon of flashtool named "BLU", but i didnt reboot at the end of unlocking, now i cant turn on the phone...
i really need your help, the phone is not mine, please help...