hi, my laptop acer aspire 5560g did not recognize the battery. so i tried to update BIOS from 1.08 and i found 2 versions. and i succeeded in installing 1.15 but that didn't help. than i tried to install 1.09 and after installation it asked me to restart, and after that i get just black screen. I tried to take out CMOS battery. after that i can see that the battery charging light is on and now i can turn on the laptop without external power. but when i turn it on, nothing happens. the screen is just black Any help would be appreciated Thanks