Jetson Nano 2GB - boots 4.3 but not 4.4

I previously had the system booting both 4.3 and 4.4. For some reason, now newly flashed 4.4.1 will not boot, but the ainano image boots 4.3 just fine. The 4.4 image just hangs and on the Nvidia logo. Any suggestions?

hello yuehlee,

had you using SDKManager to perform a whole flash to flash JetPack-4.4.1 release image to your Nano platform?

hello yuehlee,

FYI,
here’s documentation of NVIDIA SDK manager, https://docs.nvidia.com/sdk-manager/
thanks