Updating your Lowrance GPS software or charts can improve navigation performance, add new features, and fix existing problems. However, some users may experience issues where the Lowrance GPS stops working after an update. Common problems include GPS signal loss, incorrect location, missing maps, frozen screens, slow performance, or the device failing to recognize updated files.

A failed update, incompatible software version, corrupted files, incorrect settings, or connection problems can cause post-update issues. This guide explains why your Lowrance GPS may stop working after an update and provides step-by-step solutions to restore normal operation.

Why Is My Lowrance GPS Not Working After Update?

Several reasons can cause problems after updating your Lowrance navigation system:

• Incorrect software update file
• Interrupted update installation
• Corrupted update files
• Unsupported microSD card
• Software compatibility issues
• Incorrect GPS settings
• Missing chart activation
• Antenna connection problems
• Device configuration changes
• Power interruption during update

Identifying the cause helps you apply the correct troubleshooting method.

Common Lowrance GPS Problems After Update

After an update, you may notice:

• GPS cannot find satellites
• Location is inaccurate
• GPS signal keeps dropping
• Maps are missing
• Device freezes during startup
• Navigation screen does not load
• Waypoints are missing
• GPS antenna is not detected
• System runs slowly
• Update fails repeatedly

How to Fix Lowrance GPS Not Working After Update

Follow these troubleshooting steps to restore your Lowrance GPS.

1. Restart Your Lowrance GPS Device

A simple restart can resolve temporary issues after a software update.

Steps:

1. Turn off your Lowrance GPS unit.
2. Disconnect power if possible.
3. Wait for a few minutes.
4. Reconnect power.
5. Turn the device back on.
6. Check GPS performance.

Restarting allows the updated software to load correctly.

2. Check the Update Installation

An incomplete update can prevent your Lowrance GPS from working properly.

Check:

• Update file was downloaded completely.
• Correct model update was installed.
• Device stayed powered during installation.
• microSD card was not removed during updating.

If the update was interrupted, reinstall the software update.

3. Remove and Reinsert the microSD Card

If your Lowrance GPS does not recognize updates:

1. Turn off the device.
2. Remove the microSD card.
3. Check for damage or dirt.
4. Reinsert the card securely.
5. Restart the device.

A loose or damaged card can cause update errors.

4. Verify Software Compatibility

Installing an incorrect update can create system problems.

Make sure:

• The update matches your exact Lowrance model.
• The software version is supported.
• The update file is intended for your region and device.

Download the correct update again if necessary.

5. Check GPS Antenna Connection

If your GPS cannot find satellites after an update, check the antenna.

Verify:

• Antenna cable is connected properly.
• Connector is not damaged.
• Antenna has a clear view of the sky.
• Mounting location is suitable.

Reconnect the antenna and restart the device.

6. Check Satellite Signal Status

After updating, your Lowrance GPS may need time to reconnect with satellites.

Steps:

1. Open GPS settings.
2. View satellite status.
3. Check signal strength.
4. Wait several minutes outdoors.

Avoid testing GPS inside garages or covered areas.

7. Restore GPS Settings

Software updates may change device settings.

Incorrect settings can affect GPS performance.

Before resetting:

• Backup waypoints.
• Save routes.
• Export important navigation data.

Then:

1. Open system settings.
2. Select reset options.
3. Restore default settings.
4. Restart the device.

8. Check Map and Chart Settings

If your GPS works but maps are missing after an update:

Check:

• Chart source selection
• Map visibility settings
• Chart activation
• Correct memory card selection

Sometimes updated charts are installed but not selected.

9. Reinstall the Software Update

If the update caused problems, reinstalling may fix corrupted files.

Steps:

1. Download the correct Lowrance software update again.
2. Format a compatible microSD card if required.
3. Copy the update files.
4. Insert the card into the GPS unit.
5. Start the installation.
6. Wait until completion.

Keep the device powered during the entire process.

10. Check Power Supply

A weak power source can cause problems after updates.

Check:

• Battery voltage
• Power cables
• Fuse connections
• Device wiring

A power interruption can prevent the software from loading correctly.

11. Remove Extra Accessories

Connected accessories may create conflicts after software updates.

Temporarily disconnect:

• External devices
• Additional SD cards
• Network accessories

Restart the Lowrance unit and test GPS operation.

Fix Lowrance GPS Not Finding Satellites After Update

If your Lowrance GPS cannot find satellites after updating:

Try:

• Moving to an open area.
• Restarting the device.
• Checking antenna connections.
• Waiting for satellite acquisition.
• Confirming GPS settings.

A first satellite lock after an update may take longer than normal.

Fix Lowrance GPS Signal Lost After Update

If GPS signal drops frequently:

Check:

• Antenna placement
• Cable condition
• Power stability
• Satellite visibility

Update-related settings changes may also affect GPS source selection.

Fix Lowrance Maps Missing After Update

If maps disappear after updating:

Try:

1. Remove and reconnect the chart card.
2. Check chart source settings.
3. Confirm chart compatibility.
4. Update the chart files again.
5. Restart the device.

Fix Lowrance GPS Frozen After Update

If the screen freezes:

Try:

• Performing a restart.
• Removing the SD card.
• Checking power connections.
• Reinstalling the update.
• Resetting device settings.

Prevent Lowrance Update Problems

Follow these tips before future updates:

• Backup waypoints and routes.
• Confirm your device model.
• Use a reliable microSD card.
• Keep the battery fully charged.
• Do not interrupt installation.
• Download updates from trusted sources.
• Update software before installing newer charts.

Frequently Asked Questions

Why did my Lowrance GPS stop working after an update?

The problem may be caused by an incorrect update file, corrupted installation, changed settings, SD card issues, or antenna connection problems.

Can I undo a Lowrance GPS update?

Some devices may allow reinstalling an older compatible software version, but always check compatibility before downgrading.

Why is my Lowrance GPS not finding satellites after updating?

Possible causes include GPS settings changes, antenna issues, weak signal reception, or software configuration problems.

Will resetting Lowrance GPS delete my data?

A factory reset can remove saved settings and data, so backup waypoints and routes before resetting.

How do I know if my Lowrance update installed correctly?

Check the software version in system information and test GPS, charts, and navigation functions.

Conclusion

If your Lowrance GPS is not working after an update, the issue is usually related to incomplete installation, incompatible software, SD card problems, changed settings, or GPS connection issues. Restarting the device, checking the update files, verifying antenna connections, reinstalling software, and restoring settings can help resolve most problems.

Keeping your Lowrance navigation system updated correctly and maintaining proper backups will help ensure reliable GPS performance and accurate marine navigation.