Process of elimination - try a different lead - nothing? try another guitar through both leads - works? then it's your guitar. Nothing goes -then it's most likely a bad electrical connection either at the jack, or at the side of the
pickup switch which ends up at the volume control. Ibanez electrics (switches, pots and jacks) are not exactly stellar quality unfortunately. Any remotely decent
music store SHOULD be able to fix the wiring if it's one of the above.
Cheers
David