If you are experiencing unusual wired noise of the fan, please follow the steps below:
Step 1: Please reinstall the touch screen cable when the machine is powered off. For detailed instructions on how to do it you can refer to this video: https://youtu.be/mlT9qgHaWoI
Step 2: If the above methods do not resolve the issue, please send us relevant information listed below via firstname.lastname@example.org, our technical support team will try our best to help.
The order number of your printer and where you bought it from.
The batch number labled on the bottom of the printer.
The firmware version number shown on the printer touch screen.