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• Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor.
• Image is displayed roughly (pixels are missing) and an OSD warning “OUT OF RANGE” is displayed: Either signal clock or
resolution is too high. Choose one of the supported modes.
• An OSD warning “OUT OF RANGE” is displayed on a blank screen: Signal frequency is out of range. Choose one of the
supported modes.
• Make sure the power cord is properly connected to the monitor and the wall, and make sure the monitor’s power switch is
on.
• Set [POWER INDICATOR] is [ON].
• Check to see if [MUTE] is activated.
• Check to see if [VOLUME] is set to a minimum.
• Check to see if the computer supports an audio signal through DisplayPort, HDMI or USB-C.
• Check [SOUND INPUT] when DisplayPort, HDMI or USB-C is in use.
• Check to see if the headphones cable is properly connected.
• Check to make sure that the USB cable is properly connected. Refer to your USB device user’s manual.
• Check to make sure that the USB-C cable is properly connected with computer.
• Refer to your USB device user’s manual.
• Check the [USB POWER] setting. If you changed the setting, please turn the power switch off and on.
• Turn the power switch off and on again.
• The monitor detected abnormal voltage or current on USB-C port. Please remove USB-C cable immediately.
• Check if the connected USB Type-C device complies with DisplayPort Alt Mode on USB Type-C.
• Check if the USB-C cable complies with SuperSpeed USB.
• Check if the connected USB Type-C device complies with USB Power Delivery.
• Check if the USB-C cable complies with USB Power Delivery.
• The monitor might have excessive voltage or overcurrent on the USB-C port. Please remove the USB-C cable
immediately.
• If you still have trouble, unplug the monitor’s power cord from the AC outlet and then remove the USB-C cable.
Reconnect the power cord and then the USB-C cable.
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