As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EADI AND EHSI DISPLAYS INDICATED ONLY RANDOM DOTS ON THE DISPLAYS. AFTER A WHILE, THE NORMAL DISPLAY RESUMED. THEN, BOTH DISPLAYS BECAME EXTREMELY DISTORTED AND REMAINED THAT WAY FOR THE DURATION OF THE FLIGHT. REPLACED DPU WITH OVERHAULED.