Ceiling fan & light won't turn on.

Verify Breakers on, wall switch on, and pull chains pulled, bulb(s) good
If not those,you will need meter. Does everything else in the room work?
Could be loose wire in canopy, since both, maybe neutral(white)
Switch is easy to jump, for test.

Is it a remote fan?

See troubleshooting instructions:

General ceiling fan troubleshooting and help FAQ- Ceiling Fans N More