Pico: Bootloader mode, than not connected

Hello Gordon,
thank you very much!

Do the LEDs go from pulsing alternately to solid when you click the Web Serial button, or just after a set period of time?

The latter, it changes to solid without interaction.

I believe the Pico you have is one of the first batch that were made 6 years ago

This is very likely, it backed the kickstarter campaign of the pico and got this one as a reward. (Just checked, that was Apr 2015! 👌)

Since I don't have a non W10 computer, I'll try my luck with the Advanced Reflash!

Thank you for the kind and fast replies, appreciate it very much!