problem with my furuno radar

[tangerine]

I have a furuno model 1622 fitted to my boat. The screen shows a warning "HD-SIG-MISS ", The troubleshooting page of my instruction manual says "check that the signal cable is tightly fastened, which it is. Anyone got any ideas? /forums/images/graemlins/confused.gif

 

[Malabar]

Heading Signal Missing? Possibly a problem with the data from the fluxgate/gyro compass, or the compass itself.