Back-from-repair C120 does not recognize/load Navionics charts

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Skip,

We're sorry to learn of the reported issue with your MFD's memory card reader. The final software update for the C-Series Classic MFDs was v5.16, not v4.20. It is recommended that you review the software history table for this product found on the C-Series Classic MFD Software Update web page to understand the changes included within each software update. In this case it is recommended that you begin with the FAQ found here. The referenced FAQ provided instructions to test the MFD's memory card reader by attempting saving waypoint data from the MFD to a compatible CF memory card. Should the MFD's memory card reader be determined to have suffered a failure based on the troubleshooting steps specified within the referenced FAQ, then it is recommended that Raymarine’s Product Repair Center be contacted to return the MFD to address the reported issue which did not exist prior to having the MFD serviced.