Confirm your model
Furuno FELCOM20 · OME-55810-A1 · 2026-01-23
How it connects
Match FELCOM20 and OME-55810-A1, 23 January 2026; do not use FELCOM19 keyboard procedures. Record Dashboard Signal Strength, Frame Sync, Current Status, GNSS Status and active alert IDs. SYNC (NCS) or Retuning is not the same as successful login or delivered mail; IDLE can be normal. For UNSYNC lasting over five minutes, record the configured ocean region and the installed ANT versus GNSS ANT connection: those connectors serve different systems. Do not disconnect or change them as a test. A touchscreen that cannot select a menu may have another hand, object or dirt on it; that alone does not prove lost satellite reception. Preserve messages/settings. No PV, distress or SSAS tests, reset, alert clearing, firmware or wiring changes; use qualified marine service.
Before buying parts
These are compatibility notes and official reference links. Confirm the fault and exact part before buying.
Model-specific parts: start with the official source
Confirm the exact model and part number with the manufacturer or provider before buying any replacement part or accessory.
Check the model and official instructions ↓