Difficult with minimal details, have youtried with a different lead and/or a different amp as you say no sound comes out of the amp, is this working. Assuming the guitar is the problem, is this on all pickups, if yes, unscrew the jack socket plate and check wiring, if this is on, take strings off, remove scratch plate and check all connections for breaks in wiring. If no joy, talk to your local repairer.
Greg, August 2007