As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEARD A POP AND SAW SMOKE COME OUT OF CAPTAIN'S SIDE WINDOW LOWER AFT TERMINAL BLOCK. A LEFT WINDOW HEAT CAUTION MESSAGE ALSO POSTED. C/W TECHNICAL SUPPLEMENT 002769-R1 AND PERFORMED TROUBLESHOOTING IAW FIM 30-41-00 & TS5003531. REPLACED CONTROLLER PN 1659-1-2, SN 3028, IAW 30-41-00. OPS CHECK GOOD. INSPECTED LH WINDOW FOR TERMINAL DAMAGE IAW AMM 56-12-01. NO DAMAGE NOTED.