Why is my computer not recognizing my external keyboard?

1. Try to find the correct device driver for the keyboard.
2. Make sure the external keyboard is properly connected to the computer.
3. Check if any special power adapters are needed for the keyboard.
4. Try to reset the keyboard or unplug and replug it.
5. Check if the battery of the keyboard still works.
6. Update the computer BIOS.
7. Test the keyboard with a different computer.