Try this to hart-reset your GPS to factory default. Map can be reload just 300 bath by ESRI.
http://www.gpsinformation.org/dale/secret.htmPerform a Hard Reset of the unit. To perform this procedure, you will need the reset tip tool, which may be unscrewed from the head of the stylus that came with your iQue. The following instructions are also included on page 1.6 of the iQue 3600a Integrated Handheld Operating Instructions manual.
A. With the unit turned off, press and hold in the reset button on the back of the unit using the reset tip tool.
B. Continue to hold in the reset button while you press and hold the power button.
C. While holding in the power button, remove the reset tool from the reset hole.
D. Continue holding the power button until the Palm logo appears on the screen.
E. Once the Palm logo appears, release the power button.
F. Press the up button when prompted to confirm the erase of user data.
