As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) TRANSPONDER SNAGGED FOR NO LIGHTS. FURTHER INVESTIGATION REVEALED BOARD NEAR TRANSISTOR WAS BURNT. THIS PROBLEM ADDRESSED UNDER MOD NR 6 FOR THIS TRANSPONDER. NEW TRANSPONDER INSTALLED AND IT WAS DISCOVERED THIS ONE HAD NOT BEEN MODIFIED. IT ALSO WAS REMOVED AND RETURNED FOR THE MODIFICATION.