As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O AT 4000 FT CAPT EHSI BLANKING ON AND OFF THEN WENT BLANK. EADI CAPT DID THE SAME AT 6000 FT. THEN BOTH CAME BACK ON AT FLT 23000.CAPT EHSI WENT BLANK AND CB POPPED AND ELECTRICAL SMELL FOR LESS THAN 20 SEC. INSPECTED BOTH CONNECTOR AND REPLACED BOTH EADI AND EHSI.