My RoadMate 700 with relatively low use won't power up at all. I borrowed a cradle and it still is dead with both lighter and AC adapter. I own a multi volt-ohm meter if any guidance can be given.
Here are a few tests you can do. Bear in mind if the unit has not been charged for some time and the internal battery is completely flat, you will need to leave the unit on charge for some time even to get a charge light from the LED. Leave it on charge for at least 2 hours. First, check the LED is lit when the cable is plugged in to the cigarette lighter socket and/or mains charger? If it is not, the fuse in the cigarette lighter adapter may be faulty or the charger may not be working. If the fthe LED is lit, then is power available at the end of the cable that connects to your unit? Use your DC voltmeter to check this. If no power is available here, then your cable/charger is faulty - obtain a new one. If there is power at the connector, then the unit may be faulty.
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