Click '''Start''' to run. Then shut down, unplug the SD card, and restart the device.
===How to flash OS onto the eMMC of CM4? (CM4 with eMMC)?===
1. Short OTG Pin, refer to the picture below.
[[File:X515-IMG-5890-1.jpg|500px]]
2. Connect Type-C OTG with a Type-A to Type-C cable to your computer
3. Power the device via PWR Type-C with your 5V Power adaper
4. Then rerfer to [https://www.jeffgeerling.com/blog/2020/how-flash-raspberry-pi-os-compute-module-4-emmc-usbboot this tutorial] to flash raspberry pi OS
5. Remove the jumper of OTG after flashing is complete, then restart your device;
'''PS：If you use CM4 with eMMC, then SD card cannot be used.'''
===Power management & safe shutdown script installation===