Green flashing LED every 5 seconds

[kbrenner]

What does it mean when you see the green LED flash roughly once every 5 seconds on the PYBD-SF6W? There are no other LED colors flashing.

[jimmo]

What does it mean when you see the green LED flash roughly once every 5 seconds on the PYBD-SF6W? There are no other LED colors flashing.

Not sure... can you provide any other info? Does the board operate normally otherwise.. i.e. running main.py, access to REPL, etc?

[kbrenner]

This issue occurs when I am running the board off of external power (5V) provided to VUSB. I do not have access to the REPL prompt to see what is occurring while the green LED is flashing every 5 seconds, which is why I asked in a different post how to record the REPL prompt to a text file so that I could go back and observe what the REPL prompt showed when this problem occurred.

[pythoncoder]

The easiest way to diagnose these problems is to use pyb.repl_uart and connect an FTDI adaptor to the chosen UART.

That said, I have run a Pyboard D for long periods (many weeks) using a power-only USB lead connected to an external PSU with no problem. Are you certain there isn't an issue with your power source? Have you tried a different source?