anecdata
Member
I've had no trouble with Teensy 4.0s. Plugged Teensy 4.1 into USB (tried several that worked before and after with Teensy 4.0), orange LED blinks. Press the button, red LED comes on, but Teensy loader does not indicate presence or activate the Program UI button. Tried several USBs, several times, Teensy 4.0s always work.
Tried board reset by holding button for 15 seconds, until red LED blips. Now board has no orange blink. It will enter bootloader (red LED) if I press the button, but same Teensy loader behavior. macOS 10.15.4. Teensy loader 1.48.
Tried board reset by holding button for 15 seconds, until red LED blips. Now board has no orange blink. It will enter bootloader (red LED) if I press the button, but same Teensy loader behavior. macOS 10.15.4. Teensy loader 1.48.