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A Lowrance GPS can be useful for navigation, positioning, mapping, and other marine activities. However, the GPS may sometimes stop working correctly, fail to acquire a satellite signal, show an incorrect location, or display an error. These problems can be caused by signal obstruction, power issues, incorrect settings, software problems, or connection difficulties.

If your Lowrance GPS is not working, you can start with a few simple troubleshooting steps before considering professional assistance. This quick guidance explains practical ways to check the device and identify common GPS problems.

Check the GPS Signal

The first thing to check is the GPS signal. Your Lowrance unit needs suitable satellite visibility to determine its location.

Move the device or vessel to an open area with a clear view of the sky. Buildings, trees, structures, and other obstructions can affect satellite reception.

If the device is currently indoors or surrounded by obstacles, move it to a more suitable location and allow it some time to acquire a signal.

Restart the Lowrance GPS

A temporary software or system problem may cause the GPS to stop responding correctly.

Turn off your Lowrance device and wait briefly. Then turn it back on and allow it to complete the startup process.

After restarting, check whether the GPS begins receiving satellite information. A simple restart can refresh the device and resolve temporary problems.

Check the Power Supply

An unstable power connection can cause a Lowrance GPS to shut down, restart, freeze, or behave unexpectedly.

Inspect the power cable and connections. Make sure everything is securely connected and that there is no visible damage to the cable.

If the device repeatedly turns off or restarts, investigate the power connection before assuming that the GPS itself is defective.

Check the GPS Antenna

If your Lowrance setup uses an external GPS antenna, inspect its position and connection.

Make sure the antenna has a suitable view of the sky and that its cable is firmly connected. A loose or damaged cable can prevent the GPS from receiving reliable positioning information.

Look for visible signs of damage around the antenna and cable. If the connection appears damaged, further technical assistance may be required.

Check GPS Settings

Incorrect settings can sometimes make the GPS appear to be malfunctioning.

Open the navigation or GPS settings on your Lowrance device and review the available positioning options. Make sure the required GPS features are enabled.

If you recently changed settings, review those changes and restore the appropriate configuration when necessary.

Wait for Satellite Acquisition

A GPS may not immediately display a position after being powered on.

Allow the Lowrance unit some time to acquire satellite information, especially if the device has been restarted, moved to another location, or has not been used recently.

Keep the device powered on in an open area while it searches for available satellites.

Check for Software Updates

Outdated device software can sometimes cause performance or compatibility problems.

Check whether an update is available for your specific Lowrance model. If an appropriate update is available, follow the manufacturer's instructions carefully.

Make sure the device has a reliable power source during the update process. Do not interrupt the update once it has started.

Check the Maps and Charts

If the GPS appears to be receiving a location but your maps or charts are not displaying correctly, the issue may be related to mapping data.

Check whether the required map or chart is recognized by the device. If you use a memory card for mapping information, make sure it is inserted correctly.

A GPS positioning problem and a map display problem can be separate issues, so check both areas when troubleshooting.

Inspect the Memory Card

A problematic memory card can interfere with maps, updates, or certain device functions.

Turn the device off before removing or reinserting the card. Check the card for visible damage and make sure it is properly inserted.

If the device starts working normally after removing a problematic card, the card or its stored data may need to be checked further.

Check for Interference

Nearby electronic equipment can sometimes affect GPS performance.

Review the placement of the GPS antenna and check whether other electronics, wiring, or equipment are located very close to it.

When possible, position the antenna away from potential sources of interference and check whether the GPS signal improves.

Check Your Location

Environmental conditions can affect GPS reception.

Tall buildings, dense trees, steep terrain, covered areas, and other obstructions may reduce satellite visibility. Test the Lowrance GPS in an open location to determine whether the problem is related to the surroundings.

If the GPS works correctly in an open area, environmental conditions may be responsible for the original problem.

Check Connected Equipment

If your Lowrance GPS is connected to other marine electronics, inspect the related cables and connectors.

A loose communication connection can prevent devices from sharing positioning information correctly. Make sure the connectors are secure and check for visible cable damage.

If the GPS works independently but not when connected to another device, the connection or communication setup may need further investigation.

Check the Displayed Location

If your GPS is working but showing an incorrect position, allow it time to stabilize after startup.

Compare the displayed position with another reliable navigation source when appropriate. Also review the coordinate and positioning settings on your Lowrance device.

Incorrect configuration can sometimes make the displayed coordinates appear different from what you expect.

Avoid an Immediate Factory Reset

A factory reset should generally not be the first troubleshooting step.

Resetting a device can remove customized settings and other stored information. Before considering a reset, try simpler solutions such as restarting the device, checking connections, reviewing settings, and updating the software.

If a reset becomes necessary, review the available instructions for your specific Lowrance model first.

Note the Error Message

If your Lowrance GPS displays an error message, write down the exact wording.

Different error messages can point to different problems. Having the exact message can make troubleshooting easier and can also help when requesting technical assistance.

Avoid repeatedly changing settings without knowing what the error indicates.

Contact Lowrance Support

If your Lowrance GPS is still not working after checking the signal, power, antenna, settings, software, and connections, additional technical assistance may be needed.

Before contacting support, keep your device model information and the exact error message available. Explain what happened and describe the troubleshooting steps you have already attempted.

This information can help support determine whether the problem is related to configuration, software, hardware, or another component.

Final Thoughts

When a Lowrance GPS is not working, start with simple checks. Make sure the device has a clear view of the sky, restart it, inspect the power supply and antenna, and verify the GPS settings.

If the problem continues, check software updates, maps, memory cards, connected equipment, and possible sources of interference. Give the GPS enough time to acquire satellites before deciding that the device has a serious fault.

Following these quick troubleshooting steps can help identify common Lowrance GPS problems and may restore normal operation without unnecessary changes to the device.