Hello. I recently replaced the laser on my XBox 360 drive, model number DG-16D4S. After replacing the laser on the unit the tray repeatedly ejects itself the drive tray partially, maybe an inch or so. I can pull it open all the way and shut it fully only for it to eject itself only moments later. Any help would be greatly appreciated. This is a project for a friend who has very limited funds. Thanks so much!