Iceball uses a phone cables to communicate between the main board, bonus sign and the LED controllers. The cables used must be a minimum of 4 conductors and must be not crossover cables. Some examples of the symptoms of link problems in the game would be LED colors not synchronized, bonus jackpots paying out when not won by a player or bonus jackpot scores and tickets changing when they are not supposed to. Please download the file below for information on how to connect the phone lines and troubleshoot the communication circuit.