OpenMV N6 not able to run machine learning tensorflow examples

I’m trying to run the “movenet_singlepose_detection” but when start the schetch nothing happen and after few second the N6 is disconnected from usb. The same happen with also hand tracking and face detections.
I’m running firmware 5.0.0 and I’ve also to update the firmware to the latest development relase including the ROMFS without success.
P.S. About the firmware update the blue led still flash also for more that 20 minutes while is written in the popup to press OK when the led stop to blink . Is it normal?

Solved :
Apparently the problem is due to a power issue on the usb port.
Connected the board on another pc it work . Reconnected to the original one fails.
The problem with the blue led flashing persist but I don’t think that is a problem.
Preassing ok before it stop seems work.

Okay, cool!