Radar "NO DATA SOURCE"

[PetrS]

Thanks for the troubleshooting instructions. All the tests passed with flying colors. There is no problem with continuity of the entire Ethernet wiring. While I was inside of the radome I also checked the power supply. The core is getting full voltage ( 14V at the time) all the way to the circuit board. Upon the radome power up I can hear high pitch noise for about 10secs, then the array turn about 2 revolutions and then the show is over.
As I mentioned before the list of external connected devices is empty, scanner page shows just a buffer. There is 0bytes on radar Tx and Rx test page.
In the meantime I have purchased Identical used system (C90W + RD418D + cable) Same results. "no data" . I guess I am just lucky. At least the MFD works fine.

Please advise what else could be checked. Appreciate all your help.

Petr