Orange LED blinking and not able to flash


I am using the TinyML board which I received yesterday from Digikey. When I plugged in a micro USB cable the onboard Orange LED starts blinking at 1 second frequency. I am not able to flash any firmware using the Arduino IDE. I tried with different USB cables but problem persists. I guess the power management chip may have some issues. Also, I tried double tapping the reset button to enter into boot-loader mode, and it allows to upload firmware but after uploading I can’t access Serial port. So basically it is not working as intended. Is the hardware faulty? How can I solve this problem?