Capcom CPS-2: Super Capacitor
If you are having audio issues with on your Capcom CPS-2 board or multi kit, then this might just be the trick to fix it.
High quality Eaton brand "supercap" to suit CPS-2.
NOTE: We can not guarantee this will solve your audio issues, but it's well documented that replacing this component has fixed many CPS-2 boards with issues. You will need to have the ability to desolder and solder to change this component on your board.