I've used this 4.3" 800x480 with Teensy 4.0
https://www.buydisplay.com/4-3-inch-ips-tft-capacitive-touchscreen-800x480-w-ssd1963-controller
Got the driver code if needed.
I waiting for about 20 seconds until the red LED flash once.
I think I solved the issue. I have to have the Arduino IDE and the Teensy programming app running. Compile the blink sketch, press the prog. button once it will progam the new blink...
I have a batch of 9x Teensy 4.1 and 18x Teensy 4.1 NE from Sparkfun.
When I plug the USB cable in, the orange LED does not flash and no comm port appears on the PC.
I tried to press and hold the prog. button for 15 seconds. The red LED flash...