I am having a problem with the sound on my No Good Gofer. The game starts off with perfect sound then as the game moves on all of a sudden you can barely hear the sound. When the game starts another ball the sound comes right back. This will happens a couple times during a game. From time to time the game sound goes away and then the game goes dead and comes right back on and you then have to start a new game. I have check all the plugs and fuses in the back box. Is there anything else I need to check.