Logic Board or Hard drive?

Trying to determine which part is broken. I believe its the drive because it's demise was from a pressure situation and I do not feel or hear it spin up. I just want to be sure because of the obvious reasons, music etc.. I get the the frown face and a depleted battery notification when the USB port is used. Battery has been replaced since, but the same error comes up, the screen still boots which gives me false hope I guess, but still !?! Any suggestions, tests or what not before I spend money on the wrong/right parts in my attempt to save music?