As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LANDING GEAR AIR/GROUND FAIL MESSAGE ON EICAS AFTER TAKE-OFF AND THE GEAR LEVER WOULD NOT MOVE TO THE UP POSITION. THE AIRCRAFT RETURNED TO IAH AND LANDED WITH OUT INCIDENT. UPON LANDING THE THRUST REVERSERS WOULD NOT DEPLOY AND AN IDLE STOP 1 & 2 FAIL MESSAGE WAS REPORTED. MAINTENANCE RESET POWER AND ALL MESSAGES CLEARED WITH NO FURTHER DEFECTS NOTED.