Radar 1715 without echoes

[ALFREDOV]

According to the Capitan the radar stopped working 3 days ago, he said that when he put in on transmission didn't show echoes.
I checked the cable, the motor in the antena is working but it doesn't show anything unless I put the gain to maximum it shows a shadow image of noise while scanning.
Anyone know a test to know if it the magnetron or the electronic board in the antena?

 

[Johnny Electron]

Modulator boards and Magnetrons use high voltages and beyond the consumer scope of this forum. It sounds like you might be a dealer. If so, you should be talking to the technical support of your Furuno distributor. If not a dealer, you might want contact one because they have access to the proper service manuals.