1. The new product of Yunkong - Conference Whiteboard has an AC switch. Before connecting to the power, please turn the AC switch to the disconnected state. After confirming that the power cord plug is plugged in, turn on the AC switch. The socket and power cord must maintain good contact to avoid loosening, ignition, and voltage fluctuations.

2. If you need to turn off the computer while it is turned on, do not directly unplug the power plug. Please close the current running program on the computer first, then turn off the computer. Wait until "no signal" is displayed before turning off the TV.

3. If the all-in-one machine needs to be turned on again after shutting down, wait at least 5 seconds before operating. Please avoid frequent power on/off operations.

4. If it is not used for a long time after shutdown, it is best to cut off the external main power supply (turn off the power socket or unplug the power plug).

5. During thunderstorm weather, it is recommended not to use the machine and it is best to unplug all power and network cables to prevent lightning strikes.

6. After using external storage devices such as USB flash drives and mobile hard drives, please follow the correct operating procedures to exit the device before unplugging it.

7. Do not add, delete, or change computer system files and settings without absolute certainty.

8. Please do not place important files in the computer's C drive, desktop, or my documents. If there are any important files, please make a backup of the data.

9. Do not use third-party software to repair the system without special requirements or absolute confidence.

10. When cleaning the machine, please unplug the power plug first and do not use a damp cloth. Do not spray the cleaning solution directly onto the area that needs to be cleaned. Instead, spray the cleaning solution onto a soft cloth before wiping. Pay special attention to preventing water from entering the machine.

11. Do not disassemble the machine yourself. Improper operation may damage the equipment. If you encounter after-sales problems, please contact the manufacturer in a timely manner and have professional after-sales personnel come to inspect and repair the equipment.