Mid 2009 MacBook Pro, I just swapped out the drive with a 500GB SSD, Samsung 850 EVO. To prep for the swap, I used a SATA/IDE to USB adaptor and SuperDuper to back up the drive to the SSD. Followed the steps and swapped drives, when I boot up with the new drive I get the chime, grey screen and Apple logo, then the laptop completely shuts off. I reinstalled the old drive just to make sure I didn't break anything and it boots up fine. Next I used the USB adaptor to connect the SSD drive, restarted the unit holding the option key, tried to boot from the external SSD, same result, grey screen, Apple logo then it shuts down. What should I do next? Is it a possible defective SSD? Thanks.