Debug uart no print message when TX2 power up

We designed a carrier board according to OEM. Power sequence is right.
But debug uart port no information to print,and i dont know my TX2 module is runing or not.
When put my TX2 module on official development board is working properly,so i think my TX2 moudle is OK. I want to konw is there any other condition restricting startup?

Is your carrier an exact copy of the devel carrier? If not, did you update the device tree for the layout changes (PINMUX spreadsheet)?