This past weekend I noticed that all interior speakers on the port side of my GS22 were not working. I first recycled the batteries, checked to make sure both amps had power and checked for any lose wires and saw no issues there. I next adjusted the balance all the way to the port side and was able to get sound out of all three speakers. I am hoping to not have to pull the boat out of the water and take it to the dealer (1.5 hr one way). Any advice on what else to check or what could be causing this?