Since the hopper motor runs during test, but does not spit out coins, then it has to be a coin jam. They can be tricky to see sometimes.
Pull the hopper out of the machine and dump out the coins. Visually check for anything (coins, paper, tape, etc) jammed under the knife (at the top of the wheel). Next, turn the hopper sideways and look at the motor on the back (the square thing). With the hopper handle towards you, the hopper brake is a tab on the side of the motor (it will be facing you). Squeeze this tab and it will release the brake and the hopper can be spun freely by hand (use the agitator to spin the wheel). This should release any coins or whatever that could be jammed.
Check it out and report back.