Make sure the cable is properly connected;
Connect with another available device or cable to check.
If still goes into same problem, please contact after-sales sevice center.
Adjust the brightness and contrast settings. Make sure the correct input source is selected.
If you can’t use the USB-C to USB-C cord you will have to use the HDMI to HDMI cord along with the USB-A to USB-C cord so that it can communicate power through one cord and graphics on the other.
If it is the noise from the connection, please re-plug the interface or replace with a new cable. If it is the sound from the adapter or the speaker, it is the quality of the power adapter, please contact us.
If still doesn't work, it is recommended to contact after-sales sevice center.
Please click Windows+P
If you have an xbox, Playstation or Switch connected, please pay attention to their maximum output refresh rate.