Disconnected the adaptors with the detector.

Added the adaptors with the kapton cables only attached.

Connected the pulser outputs ( pos and neg ).

nnaida11,13 & 14 : Stat spectra are normal. Rates are 10k to 16k

nnaida12 has normal stat spectrum with ASIC3 only showing channel 5.

Power cycle and re-try.

No different.
Suggest change the Mezzanine on nnaida12 and ask for the ASIC to be replaced..... maybe visible signs of problem ?