8210 problem

my uncle has a 8210 and whenever we open the inbox or sim services menu, the lcd screen would just go blank, nothing is displayed on the screen. what i mean by blank is the screen is totally blank... no back, open or any text below the screen. nothing is displayed on the screen. even if we press any button, the keypads, arrow buttons, green and red call buttons, volume buttons, everything.... nothing still appears on the screen. its still can be called but nothing is displayed on the screen. the screen looks as if the fone is off. we already changed the lcd twice but the problem is still there... any suggestion guys?? thank u very much.

sounds like a software corruption

software re-flash to latest version should fix..

thank u very much for ur reply... i'll try that. thanks again :D