I HAVE AN IGT SPLUS 3 REEL 2COIN FIVE TIMES PAY SLOT MACHINE.THE MACHINE WORKED FINE UNTIL I DECIDED TO INSTALL REEL PROM 7459 AFTER DOING A RAM CLEAR.THE MACHINE WILL NOT SPIN REELS ON START UP AFTER IT CLEARED ALL REGULAR ERROR CODES(61,61-1,65-1)AND JUST HAS A ZERO SHOWING IN THE COINS PAID DISPLAY AND WILL NOT PLAY ANY GAMES.THE LITTLE WHITE BUTTON ON THE ENCODER BOARD WON'T ACTIVATE ANY CREDITS EITHER. I AM USING THE 731SP GAME PROM.I WAS THINKING THE PROBLEM WAS BECAUSE THE 7459 HAS 256 VIRTUAL STOPS? THE OTHER TWO REEL PROMS THAT WORK FINE ARE THE 6248 AND 7812 AND THESE HAVE 90 STOPS.DO I NEED ANOTHER SP CHIP?