It's been a long time since I did any work on 360's, but if I recall correctly... there's a "key" assigned to the original optical drive in the 360. If you replace the drive, the key will no longer be the same and the 360 won't boot up normally. There was a software called Jungle Flasher that allowed you to extract the key from the old drive & transfer it to the replacement drive. There's a thread on it here: https://www.se7ensins.com/forums/threads/how-to-flash-your-360-drive-using-jungle-flasher-1-69-x64.118960/