As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5303 - AUS-STL - AT FL 370, MESSAGE DISPLAYED TO CHECK PFD. CREW LOOKED TO PFD, RED X DISPLAYED FOLLOWED BY SCREEN BLANKING. ATTEMPTED TO INCREASE BRIGHTNESS, SCREEN REMAINED BLANK AND CREW NOTED AN ACRID SMELL. NO VISIBLE SMOKE. DIVERTED TO SGF. MAINTENANCE REMOVED AND REPLACED PFD 2 DISPLAY IAW EMB MM 34-22-01. OPS CHECK NORMAL AT THIS TIME.