I don't think that you can attach the drive to another machine, install windows on the drive and then put the drive in the laptop and have it boot. Unless you are using tools that specifically do that for the model laptop you have (like a big company does).
Are you able to install Windows on the laptop (not just try to repair a Windows install created on a different computer but actually put the Windows 7 DVD in the laptop, boot with it and install it to the hard drive)?
Are you able to use another boot CD like a Linux LiveCD to see the drive and the files on it in the laptop?
The "checking media (failed)" error may be related to UEFI booting on that laptop. I don't know since I am not familiar with that model. It could also be an indication that the drive is broken or not being seen properly (probably the latter since it works when connected to the other computer).
Maybe someone else more familiar with that model can join in.
Oh, and one more question, did it have Windows 7 on it before it broke or was it once Windows 8? This could be important
-=[ James ]=-