Here are some suggestions that could solve the problem and prevent you from having to be without your unit!
* Check the Fuse: If your unit will not power up. Check the fuse. It will be located in a fuse-holder attached to the red wire on the power cable. If the fuse has blown, replace it with a fuse that is the same value. If the unit is wired to a fuse panel, check the fuse in the panel.
* Inspect the Connections: Make sure the power cable connector is seated securely in the connector on the unit. Make sure that the cable connections to the power source are not loose or disconnected.
* Clean the Connections: Corrosion or oxidation could occur on the power cable connector pins and fuse-holder. This can prevent sufficient power from flowing to the unit. Clean the connections to be sure. Sometimes the substance is clear and not easily seen.
* Verify the Presence of Voltage: Using a volt-meter, verify that your power source is outputting 12 volts. Then use the volt-meter to verify that the same amount of power is coming through the cable connector that plugs into the unit.
* Rechargeable Batteries: If your unit has rechargeable batteries, try charging them overnight to give them ample time to charge.
* Cigarette Lighter Adapter Cable: Click here to see how to check the fuse in the power cable.