I got a new MaixPY Go and assembled it accordingly to the video on youtube. When I switched it on the red LED and 2 blue LEDs are constantly glowing, but no blinking blue LED. The screen stays dark and no boot message comes up. When I try to connect to the device via my laptop running ubuntu to flash a new firmware is says:
$ python3 kflash.py -p /dev/ttyUSB0 -b 2000000 -B dan maixpy_v0.3.2_full.bin
[INFO] COM Port Selected Manually: /dev/ttyUSB0
[INFO] Default baudrate is 115200 , later it may be changed to the value you set.
[INFO] Trying to Enter the ISP Mode…
.Warning: recv unknown op 250
[INFO] Greeting Message Detected, Start Downloading ISP
[INFO] CH340 mode
but it is not doing anything. What is going wrong?