As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INOPERATIVE. WILL NOT EVEN TEST. PERFORMED PRELIMINARY INSPECTION. FOUND UNIT NOT POWERING UP. CHECKED FUSE F401. CHECKED GOOD. FOUND S302 ON/OFF SWITCH NOT MAKING CONTACT. CLEANED S302 SWITCH. REPAIRED. ALSO REPLACED BAD PHOTOCELL V301. REPAIRED. BENCH CHECK GOOD.