When your Garmin, Raymarine, Furuno, or Simrad starts glitching, it's almost always firmware, network, or power — not a dead unit. Don't replace it before troubleshooting.
What to Check
1
Power-cycle the network
NMEA 2000 networks lock up. Pull all 12V power for 60 seconds, then re-energize. Fixes 30% of issues.
2
Firmware out of date
Outdated MFDs misbehave with newer sensors. Check the manufacturer site for the latest firmware.
3
NMEA 2000 backbone
Loose terminators, missing power tap, or one bad sensor brings down the whole network.
4
Chart card corruption
Pull the chart card and reseat it. If the unit boots without the card, the card is the problem.
When to Call Us
We're factory-trained on Garmin, Raymarine, Simrad, and Furuno. We bring the diagnostic cables and software to your slip.