so the other day my macbook just died. i tried a thousand things to fix it. and in the end just went out and got a new macbook pro. my old macbook was about 3.5 years old. well my mother uses a macbook about 2.5 years old for work. it has ALL of her work info on it. me being the idiot i am thought that if i took the hard drive out of my old laptop, and put it into her lap top i would be able to retrieve all my old files. i clicked her laptop on with my old HD in it and the screen went white while i heard the BUMBUMMMMMMM sound. but, no apple icon showed up to tell me it was loading. a little annoyed and not wanting to mess anything up, i decided this was a bad idea, and put her hard drive back into her computer, screwed the panel back on, and turned her Macbook back on with her hard drive in it. well it turned on, but the LED white light does not turn on at all. the screen turns white, and i see the apple icon with the gray spinning wheel below it telling me the computer is booting up. its been an hour, and the computer is still booting up...... did i just entirely break my mothers computer??? Please, any ideas on what i did, or what i can do to fix it would be great. her computer worked FINE before i played with it. whats wrong? what can i do?