As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5284, STL TO BDL, DURING CRUISE AT FL340, THE CREW RECEIVED A RUDDER SYS 1-2 INOP EICAS MESSAGE, FOLLOWED BY AUTOPILOT AND YAW DAMPER FAIL. THE QRH WAS FOLLOWED AND THE RUDDER 2 BUTTON WAS RELEASED WHICH THEN RESTORED POWER TO THE RUDDER 1 SYSTEM. THE FLIGHT THEN DIVERTED TO CMH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE SYSTEM TO THE PRESSURE SWITCH FOR THE RUDDER SYSTEM 2. AFTER REPLACING THE PRESSURE SWITCH THERE WERE NO FURTHER MESSAGES, AND THE AIRCRAFT WAS RETURNED TO SERVICE.