Power went out when i was installing windows 8 in my asus laptop. I think the power went out while i was formating a partition.now my laptop wont boot..getting a black screen after asus logo. I cant even get into bios menu to change the boot order.i tried all the keys but of no use..is there a chance of hard disk getting corrupted..is there any other way to boot from cd rom or usb since i cant enter bios menu..