how do i transfer data from my old macbook 13" 2008 to my new macbook pro 13" but my old macbook won't turn on

hello! i went to the Genius Bar and they told me my logic board needed to be replaced on my old white macbook 13". however, i need to get my data and information from my old macbook but my old macbook won't turn on. i was told by Genius Bar that the hard drive could be accessed via the 3 screws when the battery was removed and the hard drive could be turned into a external hard drive once removed. that way i could transfer my music, movies, pictures, etc. they told me that Best Buy could do the data transfer for me. i went to Geek Squad but they told me the hard drive wasn't accessable behind those 3 screws, that the ram was there instead. i just want to transfer my data. please help!