TX2 not booting after successful flashing

@WayneWWW, hi,

it is great that Nvidia keeps track of all issues raised, per your reply TX2i can not boot on custom carrier board, but TX2 is ok. What's the difference between them? - #11 by WayneWWW
I shall modify the file
/home/nvidia/HWImage/JetPack_4.5.1_Linux_JETSON_TX2/Linux_for_Tegra/p2771-0000.conf.common:
modifying

ROOTFSSIZE=28GiB;
CMDLINE_ADD=“console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 isolcpus=1-2”;
CMDLINE_ADD=“fbcon=map:0 net.ifnames=0 rootfstype=ext4 console=none keep_bootcon”;
target_board=“t186ref”;

Note: I do not know what isolcpus=1-2 does so I just add a new line and not replace the previous CMDLINE_ADD

Regards.