Please follow the steps below for troubleshooting.
1.Remove all USB devices from the monitor except the USB-C cable or
USB upstream cable (USB TypeA to TypeB cable) and the calibrator that
connects to the PC/NB and the monitor.
2.Uninstall the current version of the PME program and all of the
3.Download the latest version of PME from BenQ's official website and
4.The Key Step: When installing PME software, keep the USB-C or USB
upstream cable (USB TypeA to TypeB cable) connected to the monitor
and PC/NB directly, and make sure all drivers are correctly installed
during the installation.
5.Reboot the PC/NB and open PME to check if it can work.
6.If the error message persists, unplug and re-plug the USB upstream
cable (USB TypeA to TypeB cable) or replace a new one.
If the issue still exists, please contact BenQ local service for further assistance.