Troubleshooting Common Fish Finder Display Problems

Fish Finder Guides

The Unit Shuts Off at High Speed or When Motor Is Started

This might be because the voltage to the unit is dropping below or going over what’s needed to make it work. There are several possible reasons for this, including:

  • The battery is not fully charged
  • The battery charging system of your boat might not be working when the motor is running
  • Too many devices are plugged into the same battery and the power to operate the fish finder is not enough
  • Connections between the battery and fish finder are either missing or damaged

Screen Goes Dark

If the device powers on but the screen goes dark, it might mean the backlight is off. To turn it back on, press and release the power button a couple of times to make the screen brighter. Save the setting by pressing the power button once and powering the device down.

Noise Interference Cause Display Issues

Do you have odd lines or ripples across your display? Look for interference from electrical noise. Power off all devices on the boat and turn them on, one at a time, starting with the fishfinder. You should be able to identify the device or devices interfering with the signal.

What If You Still Have Display Problems?

If these tricks don’t fix your screen issues, there are a couple more things to try.

  • Double-check all electrical connections to make sure they are all secure.
  • Complete all software updates. 
  • Keep your screen clean with soap and warm water (never use abrasives). 

If none of these approaches corrects the issue, you might need to reset the device. Always follow the manufacturer’s instructions and try a soft reset before you attempt a hard reset.

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