Hi,
I have a pyboard which has not been used for few months. I was tinkering its SPI interface yesterday. I use putty to REPL. It was slow to establish the connection, but it worked in the beginning. At one point, the pyboard stops responding and could not be recognized by my computer, even as an external drive. The firmware version was January 2019, so it should be compatible with Win10.
I tried to do a factory reset, but the board doesn't respond to USR+RST. It also doesn't reboot when I push RST.
When powered up, only orange, red and blue LEDs are on. The green LED is off.
Is there still a chance to revive this unit?
Pyboard not responding
Re: Pyboard not responding
Hrmm...that doesn't sound good 
Two things to try:
- Hold down USR while plugging in the USB cable. See if that makes the LED flash in sequence.
- Try putting it into DFU mode (use a wire to connect boot0 to 3.3v -- https://github.com/micropython/micropyt ... are-Update ) and see if it shows up as a USB device.
Make sure nothing else is connected to the board.
Two things to try:
- Hold down USR while plugging in the USB cable. See if that makes the LED flash in sequence.
- Try putting it into DFU mode (use a wire to connect boot0 to 3.3v -- https://github.com/micropython/micropyt ... are-Update ) and see if it shows up as a USB device.
Make sure nothing else is connected to the board.