|Dropping a laptop often damages it such that major parts need to be replaced. Make sure the optical drive is pushed all the way in. If that doesn't help, you should unplug the AC adapter and the main battery to prevent further damage, and either|
- take it to a laptop repair place to have them evaluate what's wrong. They do that and repair dropped laptops frequently.
- find a service manual for your model online and take it apart properly yourself to see what is damaged.