Hp pavilion dv6 not starting up.

Un named

Apr 8, 2012
Hey, so I dropped my laptop yesterday when it was on it was completly fine untill I tryed to turn it on after turning it off and came up with the hp logo like always but just turns to a balck screen like its going to start up and then does nothing for about 10 minutes then returns to the logo and so on. I can get into the start up menu by pressing esc. I have done a run in test and hard drive goes to 75% then stops and says in red "replace hard drive 1" I tryed restoring it didn't seem todo anything. I did backup my photos and videos from the recovery option they have from the start up menu I backed them up on my external hdd after formatting it it said it backed them up fine but when I opened my external on another computer it came up with file type applacation how do I veiw these files? Sorry for rambling on so my two questions are
1. What's wrong with my computer
2. How do I acces my back up files from another computer from my external?
Thanks so much for any feed back.