Instructions for use: <br>If there is no special system for the screen installed, it will just be a blank screen after booting, because this 3.5-inch display relies on the SPI interface (pin header) to output video. The system that directly installs the Raspberry Pi official website will also have a blank screen, because there is no SPI driver in the official system, and the system defaults to outputting video from HDMI. It is recommended to directly use the dedicated raspbian system that we have configured the SPI driver. If you want to use your own system, you need to solve the driver problem yourself.
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