Dead On Arrival

[Dramatic Explosion]

When I connect the USB cable, all of the lights flash once, then go out. That's all I can get it to do. Seems totally dead. Computer does not see it. Is it DOA? If so, how do I go about getting a replacement?

[Damien]

The normal behaviour of a pyboard (PYB or PYBLITE) is to flash the green LED very briefly when it starts up. If it doesn't do this then it could be broken.

Try doing a factory reset by following these instructions: http://docs.micropython.org/en/latest/p ... reset.html

The board should appear as a USB flash drive on your PC. Note that some USB cables are "power only" and don't send data through, so you could try a different USB cable if it's not working.

If none of the above work then please contact the place you purchased it from to get a replacement. Purchases from https://store.micropython.org should contact the email address: contact -at- micropython.org

[chrismas9]

Try connecting BOOT to 3.3V, then plug in a USB cable. Your PC should see an STM32 device in dfu mode. If so the board is probably ok and you can reload MicroPython with a dfu utility.

Also test you USB cable with another device, eg phone, and make sure you can see the device on your PC.

[Dramatic Explosion]

The first 3 cables I tried were either defective or just charging cables. I tried a 4th one and everything worked. Sorry for the false alarm.
PS Pleasantly surprised that my call for help was answered so quickly. This must be a great forum!

[pythoncoder]

I got caught out by a "charging cable" the other day; never knew they existed. These things lurk in dark corners patiently awaiting their next victim