A quick guide to accessing the RoadMate's logic board.
Remove 4 rubber caps covering each screw by inserting the screwdriver into the side of cap and prying back and forth.
Remove the 4 screws holding the cover in place using a Philips #00 screwdriver.
Open the back cover.
Disconnect the speaker from the terminal.
Unscrew the 2 screws on either side of the board.
Lift the circuit board up and disconnect the GPS connector.