As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DU CAS MESSAGE AND PFD 2 CIRCUIT BREAKER POPPED. STRONG ELECTRICAL ODOR ALSO. CORRECTIVE ACTION: CONFIRMED PFD 2 BREAKER TRIP IMMEDIATELY WITH AVIONICS SWITCH ON. REMOVED #5 DU SCREEN. APPLIED POWER AND CB IS NO LONGER TRIPPING. INSPECTED WIRING BEHIND RH CB PANEL AND BEHIND DU #5. NO DEFECTS NOTED. INSTALLED CUSTOMER SUPPLIED MODIFIED DU SCREEN. REMOVAL/INSTALLATION ACCOMPLISHED IAW CESSNA 750 MM 31-50-01. OPS CHECK GOOD.