As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SIDE EFIS DISPLAY WENT BLACK WITH A RED X ACROSS BOTH DISPLAYS. FAULT FOUND WAS THE MOUNTING RACK LOCKING SCREWS WERE OUT OF ADJUSTMENT, ALLOWING THE SYMBOL GENERATOR TO BE LOOSE IN THE RACK AND THE PINS TO GET COATED WITH A DUST, THUS LOOSING CONTACT. CLEANED BOTH THE PINS IN THE SYMBOL GENERATOR AND THE RACK. READJUSTED THE LOCING SYSTEM. REMOUNTED THE SYMBOL GENERATOR. ALL SYSTEMS TESTED GOOD.