My NX demo board can't boot

When I debug I2C, I use the command “sudo i2cset -y 0 0x50 0x20 0x55” and “sudo i2cset -y 0 0x50 0x21 0x55”. I modified the values of device address 0x50, register address 0x20 and register address 0x21 on i2c-0. Originally, their value was 0x30, but now I modified it to 0x55; Then I can’t turn it on;
The error reported during startup is
[ 1.848760] imx219 9-0010: imx219_board_setup: error during i2c read probe (-121)
[ 1.849066] imx219 9-0010: board setup failed
[ 1.873165] imx219 10-0010: imx219_board_setup: error during i2c read probe (-121)
[ 1.873452] imx219 10-0010: board setup failed
WARNING: at platform/drivers/pg/pg-gpu-t194.c:185
WARNING: at platform/drivers/pg/pg-gpu-t194.c:185
WARNING: at platform/drivers/pg/pg-cv-t194.c:73
WARNING: at platform/drivers/pg/pg-cv-t194.c:73

hello 1848104716,

that’s not related errors.
those are camera detection failure due to you don’t have Raspberry Pi v2, IMX219 camera connected.

besides,
what’s the detail error about not booting, the logs you paste is already booting into linux kernel.