Several developers have published simplified or specialized carrier board schematics that are easier to modify than the complex official IO board:
Look for the brand (ASUS, MSI, Gigabyte) and the model printed in large white text (e.g., B450M-A ).
When you see "94V-0" printed on a CM4 board, it is not a model number but a . This is a safety certification indicating:
. This is the board you plug the CM4 into to access USB, HDMI, and PCIe ports. Raspberry Pi 2. What "94V-0" Means on Your Board
