We just bought a house that has ceiling fans and one has a Hampton Bay remote. The display works, but it won't work the fan. Does anybody know about an instruction manual online that maybe has the reset instructions? Or maybe have any other hints? Thanks! :p

Check first to see if the dip switches match those in the fan.

See:

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More (http://www.ceiling-fans-n-more.com/ceiling-fan-remote-controls.php)

Does it have pullchains?

Yes... I've tried turning them on and off but it doesn't help

Have you checked to make sure they match the switches in the fan?