I have a 2009 macbook pro here that has developed a faulty hard drive. I've swapped it over to a new one. I've done this countless times over the years but this one has stumped me. I have tried booting from a lion recovery usb stick and from an el capitan install but with the same results. I select the usb to boot from, it brings up the OSX utilities screen, with the usual options to restore from time machine backup, install osx, disk utility ect. I can move the mouse around, but clicking does nothing, i can use the keyboard arrow keys to select anything form the list but pressing enter does nothing. So i cant install OSX. I have another mac that I used to format the drive in HFS before it was put in so it shouldn't need formating in the macbook. My only guess is its a hardware failure of more than the hard drive. any ideas anyone?