This may been a power issue. The fall might have damaged the DC-IN board/connection. Battery could be dead. Unit may not be getting power.
Try another known-good AC adapter and see if it will then boot. (it should boot up even without a battery in/connected).
If no boot then, you have to see if you can get another charged battery to test the main board. Unless you test as described above, you will not know if it is just a power issue.