Raymarine C120 & 4kw Pathfinder Radar shows only half of the picture

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Romanp

Member
Joined
Apr 29, 2020
Messages
11
Location
United States
Vessel Make
Sea Ray 390
Was on my way with the radar on, when I got some red lines across my c120, and then vs. seeing all 360-degree radar scans I see only 180 . If I adjust the bearing, then the 180-degree image moves accordingly. The second symptom that started to happen is that when I shut down the radar, it stops in a random position and when I turn it back on, it doesn't start to rotate. I have to manually readjust the antenna and try to turn it on again. It seems that it can start the rotation only if it had stopped at a particular angle, if not, then it won't start spinning again.

Radar passes all tests on the c120 screen, with no failures.
Replaced M92654-S computer with another one, same problem.
Factory settings reset on mfd c120

Please advise
 

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