Help Resetting Sankyo lucky 7's

[93sooner]

Hi everyone.

I'm brand new here and trying to solve a problem for my Father in law. When I was in the Corps my in laws visited in Okinawa and picked up this Pachinko Machine. Well now my daughter hit the lucky triple 7's and the machine won't do anything and it sounds like it needs to reset but I can't find a reset button (and we don't have the front key).

My father in law as been and while it's fun to watch, I'd like to fix it.

When we start it up, the wheels spin, stop at 7's and it startes beeping and flashing an E (which apparently means End) and 5 lights (see the pic). I've attached pics of the front and back. Any assistance would be appreciated and that would make you , him and me.

Thanks,
93sooner