I have a laptop and it has been dropped a couple of times. Now the CD/DVD-ROM drive will not work. When I put in a cd, I can hear the cd starting to spin, but then nothing happens. The computer will not read the cd. It shows up that nothing is in the drive. I know that this means that something is broken, but what exactly is it? What do I need to do to fix it? Do I need a new drive, or is it something with the computer? Thanks for any help you can give me.