2. Look for serial number information, and look for options related to serial number in the menu, which may be marked with words such as serial number and SN.
3. Check the back of the monitor. Information such as serial number or product code may also be printed on the back or bottom of the display.
4. Consult the technical support of the manufacturer. If you can't find the serial number or need more help, you can contact the monitor manufacturer or customer support department for consultation and provide the monitor model and other relevant information for further help.