I restarted my computer and rebooted the device again and it all worked, I think there was something strange in the USB communications but the device is not bricked!
I also performed the "Memory Wipe & LED Blink Restore" from the T4.1 product page.
- Holding the button caused the LED to go off for 13 seconds, then a short blink occurs, then the LED goes back to blinking at 1Hz on...
I recently updated to Teensy Loader 1.56 after using an older version (unsure what the old version is).
I have two devices, the first one updated the bootloader automatically updated no problem. The second one failed...
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