What was found
IAH - FLIGHT 2163, THE CREW REPORTED LANDING GEAR LEVER, BACKLIGHTING PANEL, UP POSITION WILL NOT ILUMINATE. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED & REPLACED BACKLIGHTING PANEL ON LANDING GEAR LEVER, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.