3300 is hopper empty. It should finish the hopper payout on it's own. Actually they have to complete the payout. You said you put coins in the hopper and waited. Normally the hopper just starts up when you close the door. They are setup to finish a payout. If it won't finish on it's own you will have to use the clear chip. Shouldn't have too, take the hopper out, slam it back in and close the door. Make sure it's not jammed with anything. You can take it out and release the brake on the motor and rotate it by hand to be sure it is working. I take it no coins where dispensed. If it just humms, it is probably stuck, the gearbox is stuck from old grease. If you have another working hopper try it.
Let us know.
Tony