EV-1 "No Pilot" (SeaTalk connected but not Receiving)

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This is a new installation of an EV -1 wheel pilot with P70 control head.
It worked successfully for a week.
Then the P70 would not light up. Raymarine sent me new P70.
New p70 lights up, but I cannot use the setup Wizard because "No Pilot" message appears.
On the ACU-100, Leds are green, then red 7x. "Seatalk connected, not receiving"
Both ACU and SeaTalk bus have separate 12v power, all fuses OK.
Multimeter on the drive motor connector does not show power, but I figure that is because motor is not is use? Correct?
Any help appreciated.