RAID 5 IN ML 370 G5 server is not rebuilding

[SHINE M.D]

There was some power problem in our Server room and after restarting one of the HDD was showing problem(red colour indication)we replaced the HDD with a new one .IN ACU it was showing rebuilding ,then after 6 minuts it's status was ready for recovery but nothing happens.Still the server is not booting.Is there any solution for this problem without reloading the server again.it shows f1 for rebuild and f2 for not rebuild ...