I am having issues with booting up the TX2 in cold conditions with our carrier board. When it warms up the TX2 is able to boot. We are wondering what signals are required to boot the TX2. We have a FPGA on the carrier board that does power sequencing and controls the RESET_OUT# and make sure all the power is good. We measured the rails of all the power on our carrier board and it is good but just when the TX2 is in a cold chamber it does not boot with our carrier board. The carrier board is at room temperature. Any help is much appreciated.