Hi, I installed a new sata 320G hard drive on to my laptop Dell E6420, but at the boot process its not recognizing anything. It keeps telling me to press any button and then when it tries to boot at the top right corner it says press F12 before going back to beginning point. I pressed F12 and ran a diagnostics test and everything is cool and has a green box with a white tick in it except for the hard drive. I've been waiting for the thorough test to finish for over an hour now. What am I doing wrong or what is wrong with my laptop?
Software/Hardware used: both software and hardware related