I just got a 17" PB G4 DLSD on Ebay, arrived in great shape with a fresh install of Leopard. I updated everything and was surfing with TenForFox when it started acting funky, beachballs on everything. I restarted and got the prohibited symbol. I tried a reinstall and was unable to complete. I ran Tech Tool Pro and got a lot of bad sectors. I installed a known good HD and got errors as well. Do HD cables just go bad? This machine still had the Kapton on the HD. Do all the 17" PBs have the same HD cable?