MacBook Pro powers on, boots to apple then shuts off
I'm having an issue where my computer boots up to the apple logo and shuts off immediately.
Which I've come to find usually means corrupted files on the HDD, so I replaced my hd, and it boots fine to the screen with the flashing ? folder
In my attempt to re-install OSx from a bootable USB drive, I boot holding the "option" button, then as soon as I click the USB drive to install OSx, it shuts down.
What could be the issue if not corrupted files?