I am back again with another question about my Presario C508US Notebook. I am trying to remove the back cover. I?ve removed all the visible screws, and the ones in the battery compartment, ones beneath the Hard Drive and 2 under the cover protecting the CPU compartment. About 13 long screws and 8 shorter ones in total. Still, I am unable to take the cover off. It seems there is a screw or 2 around the heat sink and the cooling fan area preventing the removal. I pried away the clip by the fan but to no avail. Any suggestions? Thanks.