C80 MFD / RD218 Radar Problem

[charris]

Power up yesterday and my radar is not working, it was fine a couple of weeks ago and I have not done anything to either system. The plotter software is the latest available.

On power up of the C80, using a radar display, I get a brief message "no data source", then a one minute countdown "checking HW", then a brief "no data source" and then a continuous display of "scn incompatible", scanner fault(s), scanner HW.

The transmit and standby buttons are greyed out and non functioning. The connections at radar plug at the MFD appears fine and resistance measurements match those of another user that posted in this forum. I have a junction block at the mast base and all is clean and tight there, both from the MFD and to the scanner. I have not been up the mast to check the terminal board inside the scanner. That will be my next mission unless one of you have additional info for me. Results of diagnostics are as follows:


DIAGNOSTICS

antenna parking offset: 0

mbs adjust: 0

gain preset: 0

stc preset: 0

tune preset: 0


SELF TEST

scanner software version: V11.00

scanner serial number: 0000000-00000

heater hour count: 0.0

scanner reset count: 0

magnetron current: 0

rotation time: 0ms

display comms: fail

cable test status: fail

shp sensor: pass

magnetron heater: pass

eeprom write: pass

eeprom read: pass

factory setup: pass

stc preset max: 0

video test: fail

receiver supply 12V: pass

receiver supply -5V: pass

receiver supply 5V: pass

IF tuned: pass


SCANNER ATTRIBUTES

scanner software version: V11.00

scanner type: unknown

scanner power: 0kw

spokes per sweep: 2048

pulse widths: 3

minimum gain: 70

maximum gain: 226

minimum sea clutter: 0

maximum sea clutter: 190

minimum rain clutter: 50

maximum rain clutter: 215

minimum FTC: 0

maximum FTC: 122


From the self test, there are a number of fails that indicate connection or cabling issues, yet there are number of "passes" that lead me to believe that the unit is certainly not dead, and that some communication at least is occurring. Significant to me is the rotation speed of 0ms. Would something as simple as a broken or slipped belt cause this as well as the other fails such as the video fail? Also the cable test failing concerns me. Would having a poor connection at the scanner terminal board result in this set of symptoms?

Any and all comments would be most welcome from Raymarine or users that have seen similar trouble with their own systems. Many thanks in advance.