As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NUMBER 535, LEFT SIDE WINDOW EICAS MESSAGE LIGHT ILLUMINATED AS WELL AS LEFT SIDE WINDOW HEAT INOP LIGHT. UNABLE TO RESET IAW QRH PROCEDURE. BOTH L2 & L3 WINDOW COLD AFTER APPROX 1 HOUR. MAINTENANCE REMOVED AND REPLACED WINDOW HEAT CONTROLLER PER MM 30-41-01. FOUND WIRES AT C/P D2290A SHORTED TOGETHER, RECHECKED WIRES PER STD PRACTICES. OPS CHECKS NORMAL.