I've been looking around to see if I can find a similar issue to mine - I can't really find anything, so I figured I'd ask you guys and gals. This all started when my cat decided that running across the room and jumping on the coffee table onto my mac and using it as a surfboard would be awesome. My lap top slid off the table and onto the hardwood floor - about a foot and half drop. I picked it up and it was still running... sluggishly... but running. I decided to reboot. On reboot - it was taking forever then I got the blinking fold with a ? I booted in Internet Recovery mode - no Hard Drive to be found. I can see Disk0 but that's it. I figure my HD bit it. Whatever, I'm bummed but no big deal. I buy another hard drive and swap it out. Reboot in Internet Recovery mode - Same thing - no HD just Disk0 So now I'm at a complete loss to what has happened and I hope some chip isn't jostled loose somewhere. Any ideas of what could be going on? Thanks for the help.