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Just a hint re the Raduino.
When I tried to flash mine I kept getting 500 Sync errors. Tried other Arduino boards and MOST gave the same error message. Same when using other cables and another Computer. I eventually found in TOOLS I needed to select the "Old Bootloader". I didn't see the actual error you were experiencing so this is just a guess. (I'm a newbie).
Mines a V6.2 board OS is Win10 on both Computers. As someone who spent their whole career fault finding in I.T. I would hesitate to flash another image unless you have completed a lot of testing first.
On Wed, 11 Nov 2020, 6:31 pm Gary Anderson, <gary.ag5tx@...> wrote:
Your reported symptoms seem likely to be USB related, not anything Raduino per se.