I'm hoping one of you guys out there can help me as this has been a complete headache

I have an Astra party games slotto fruit machine with 500 pound jackpot, i have fully filled the machine with 600pounds and filled the second hopper with the 10ps however I cannt seem to get the note Acceptor to work it's not lit, there is power going to it as you can here it starting up when you turn on the machine but doesn't want to know after, it's not coming up with any errors or anything.. I have tried a brand new note acceptor but still does the exact same, I have tried doing a ram clear still no joy, I wonder if anyone has any idea as to what it is??
I apreciate any help..
Many thanks
Andy