As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ENGAGING CAPTAINS AUTO/MAN VOR/DME SWITCH ON MCP A SMALL AMOUNT OF SMOKE CAME OUT FROM UNDER THE GLARESHIELD. SWITCH WAS PULLED OUT AND SMOKE STOPPED. FOUND VOR/DME CONTROL PANEL BULBS ARCING. REPLACED PANEL PER M/M. OPS CHECK GOOD.