Hi just bought a global club machine called wacky weekend, it was working fine up until the person I bought it off emptied the hopper via the menu, when I got it home and turned it on it reads on the display " hop pnd fault 1, opt dirty/faulty" I googled this and someone said it maybe the coin sensor, so I cleaned this but still no luck! Is it cause it has no money in or something else, nothing else works or flashes, any help would be very much appreciated.