RD424 modulator board replacement

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Douglas,

Unfortunately, internal component level diagnostics is outside of the scope which may be provided. Additionally, parts and service are no longer available for radome and open array radar pedestals lacking Ethernet communications interfaces (ex. 2D, 4D, RD218, and RD424 radomes). One of our US west coast dealers, Radar Marine, has had a history of repairing / supporting radar products following their retirement by Raymarine. Accordingly, it is recommended that Radar Marine be contacted to determine whether they can provide parts and service for your radome. The label which you have referenced is a production lot/inspection label and would not be used in identifying the part.