So my centipede cab sat for a few months . When I plugged it in, game played but no sound, rebooted a few times and got very low, minimal sound, then on next start up jumbled screen. I sent both the mpu and ARII boards out and had them looked at. the game now plays again (bad rom). On start up however , there is no sound, it comes on at very very low level after about 30-45 seconds. you can barely hear it. the volume pot seems to be working as you can increase /decrease the sound , funny thing is if I activate the slam switch on the door, there is a very loud scratchy/squealing noise, but the game sounds are now at proper volume, until I release the slam switch. Any ideas ?. Thanks..