Hi guys, i own a DV5 -1199 and since a few days i cant start it,after the Hp logo i become a black screen . it isnt possible to start from any device . i wanted to configure the boot order and surprise boot device are not listened ,there are only glitches in the menu . probably the bios is corrupted . i wanted to recover the bios but i cant find the right combination key ,i tried "Windows + B" ,"Fn + esc" but it wont work , please if someone can help ???