My 1990 525i instrument cluster not working (Speedometer, Tachometer, Fuel Gauge & Temperature Gauge not working along with the LCD module and odometer. This problem started a few days ago, I would be driving when all of a sudden the instruments go off and I hear the boing. (keys in the ignition sound or door ajar etc..). What could it be. Could this problem be caused by the Check Control Module ? PS. The Boing sound is also not functioning. This rules out bad intrument cluster ?!. Please help.