screen frozen - magellan rm 700

[craig700]

when i turn my rm700 on, the screen is stuck at the options (user 1) (user2) (user 3) screen

i hit all the buttons but nothing happens

i reboot the unit (unplug, then plug) and the unit behaves the same
way when it turns on (ie frozen)

what is wrong and how can i fix it? thanks

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