Tiger no longer recognizes my Combo Drive

While watching a DVD, my laptop had a bad crash. I was able to restart the computer, but since then, the OS no longer recognizes my Combo Drive.
When I start the DVD Player app, it gives me the message "There was an initialization error. A valid DVD drive could not be found. [-70002]"
And in System Profiler, the DVD player no longer shows up.
Two questions:
1- how can I restore the OS's recognition of the DVD drive?
2- how can I get the DVD drive to eject the DVD that is stuck inside my laptop?
Thanks in advance.

To eject the disc, hold the Mouse button down, (left one if you have more than one), while it's booting up.
"Try Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk."
At step 4 or 5, does your optical show? Or did it even boot from it?

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