Various gaming machine design features and functionalities are described herein relating to gaming machine display screens, access doors and toppers. In some embodiments, the gaming machine may include a main door support assembly which includes a stabilizing strut between flat components arranged into parallel planes forming a four-bar linkage, and facilitates an upward and outward movement of the main door assembly from a closed position. In some embodiments, the gaming machine may include a topper assembly which is configurable in a hands-free intermediate service position and a final installed position.