My MBP 15" Early 2011 appear in grey screen afterapple logo during reboot. if i reboot using recovery disk it become blue screen after apple logo...both of thing also happen after i recovery my os x using internet recovery.

what is the problem actually.? i was read it may be related to GPU issue for MBP Early 2011. if really i need to replace my logic board, i suggesting my self to throw away this MBP.