Acer aspire one 522

Hello,
After one month I bought used ao522-c5dkk, I reinstalled it from windows starter to win7 ultimate, I Update all driver and everything was good, but then I Update bios, after Update computer restarted and showed black screen whit blinking line in corrner, I waited for one hour and nothing happened, I force shutdown and turned it in all led are working, computer reads hdd, fan is working, but I got black screen, no bios Menu no lights nothing just black screen, and I cant found for this model fixes, can please somebody help me? I tryed to take out cmos battery, but nothing happened, please help me.