If your display on the Entegra EX500/EX600 inverts the images (see photo), you will need to contact the shop or Duncan Aviation in Lincoln Nebraska (USA).
For updates to the Terrain information on the Entegra's (EX5000, EX500, etc.) please contact Jeppesen. The terrain update can take upwards of one and a half (1.5) hours, you must have an external power source. If power goes off during the update: The EX500 - your shop will have to call Duncan to have the unit sent …