G120 stuck in loader "Bad firmware"


Got a two of our boards stuck in bootloader from factory.

When I press * in bootloader I get “bad firmware” after update.

I have checked Power and all lines and they are fine.

Any solution to this?

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@ Honken - Did you receive the boards from us like this?

Got this too for a custom board we made. Tried to set a transfere delay of 10ms/char and then it worked. (Used TeraTerm with XMODEM)