Ok, I have reset, back to factory, the router. and rebooted all devices
still strange happenings.
I can see the failed HL2 in the devices list of the router at 192.168.1.77 and my other HL2 on 192.168.1.78
I can ping the HL2 on 1.78 but not the HL2 on 1.77
I can see HL2 - 78 but not HL2 - 77 with SparkSDR
HL2 - 77 has D2,3,4 flashing and d5 on
HL2 - 78 has d2 flashing and d3,4,5 on
Both HL2 are firmware version 73, firmware patch 2 and board id 5
Still
Help and ideas please, thankyou, Mike