Furuno GP-90 - Troubleshooting Flow Chart

4. Troubleshooting
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4.4 Troubleshooting Flow Chart
Start
Press Power Switch.
Power?
Flow chart 1
Position fix?
DGPS 2D/3D
mode?
Normal display?
Key operation?
End
No
Yes
No
No
No
No
Flow chart 2
Flow chart 3
Flow chart 4
Flow chart 5
Yes
Yes
Yes
Yes