Welcome to Raspberry Pi 4B repository
1.5 Precautions
1. It is forbidden to short-circuit the pins of the Raspberry Pi, especially VCC and GND. Short-circuit will cause the chip to burn out and cannot be recovered.
2. It takes several tens of seconds to start the Raspberry Pi. The power cannot be turned off within 1 minute after turning on the power, which will affect the life of the Raspberry Pi.
3. When the SD card writing system is completed, the system will prompt to format. You do not need to format at this time, just click “Cancel”. If you click format, the Raspberry Pi will prompt that there are missing files and you need to re-write the system image file.
4. The HDMI port of Raspberry Pi 4B becomes two micro-HDMI ports (hdmi0 and hdmi1), which can be connected to two displays.
5. If you only connect a monitor, you must plug in the hdmi0 port, which is the one close to the type-C power port, to display normally; if you only plug in the hdmi1 port, the monitor cannot display.
Note: Reverse connection of the HDMI cable will damage the interface!