I would say as a minimum the audio amp is blown, weather or not a reset will fix the reset remains to b e seen until you try that first then if dcs works again but no sound might just be only the audio amp needs replaced! do a conventional reset 1 bell and 5 whistle in 1/2 second intervals you should hear 2 whistle toots if it works but you wont hear it if a audio amp is blown. however you could then try adding engine after reset and see if board works with dcs again!
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