Hello, yesterday i got black screen on my macbook pro, after restart i got question mark folder so i decided to reinstall my lion. Disk utility or reinstalling couldnt find my hard drive and i couldnt erase it, repair it or make partitions nothing so i installed OSX on external HD and its working but just in case external HD is connected. I still cant see my mac HD in disk utility, nothing in About the mac - no HD. Is it dead? Im enclosing pictures. Thank you