Raytheon Quantum transmit help

[Neeen]

Just lost the transmit on my Raytheon Quantum radar.
e165 display shows a good power up and the radar icon
Is transmitting shows icon turning but the expected sweep is not showing o the display.

Anyone have this happen and know what the problem is?

Anyone know what I can do to isolate the problem?

Is it the radom, cable or chartplotter display?

No error codes on anything

 

[Neeen]

With gain set to 100%, I do get a blue sweep but it dissapears at 98% ... would this indicate it is the dome that needs to be serviced?