As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MULTIFUNCTION DISPLAY WENT BLANK. TROUBLESHOOTING FOUND THAT THE SG WAS INOPERATIVE. FURTHER TROUBLESHOOTING FOUND DIODES CR79 & CR80 DEFECTIVE. IT’S UNCLEAR IF THE DEFECTIVE SG TOOK OUT THE DIODES OR DIODES TOOK OUT THE SG. THE DIODES WERE REPLACED WITH NEW & THE SG WAS REPLACED WITH REPAIRED UNIT. ALL OPERATIONS CHECKED SATISFACTORY.