The document linked below explains PicoZed SDR 2x2 System-on-Module (SOM) power up issues that have been occasionally reported. This pertains only to part number AES-Z7PZ-SDR2-G. This document also provides the steps necessary to update the firmware of the power sequencer located on the SOM, which resolves the power up issues. This critical update should be applied to all PicoZed 2x2 SOMs to ensure reliable operation.
https://avnet.egnyte.com/dl/9PD26RxEwJ/PicoZed_SDR_Z7035-AD9361_Power_Sequencer_Update_v1.4.pdf_
The SOM User Guide has been updated accordingly.
/Matt