i have a JPM casino crazy machine, had it for a number of years and the coins got stuck a few years (!!) ago in it. Decided today to give it a quick clean and sort out the coins so the kids can play it. All going ok, removed the coins, had a quick play

I have a red light flashing right at the top of the machine next to where the coins go in and nothing else. Cant find our manuals or a 'reset' switch and have search the net... but nothing... hoping its something simple??
Thanks