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• Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor.
• Make sure the power cord is properly connected to the monitor and the wall, and make sure the monitor’s power switch is
on.
• If no video is present on the screen, turn the ⏻ key off for 3 seconds or more and on again.
• Make sure the computer is not in a power-saving mode by touching the connected keyboard or the connected mouse.
• When using DisplayPort, some display cards do not output video signal under low resolution modes when the monitor is
turned OFF/ON or disconnected/connected from the AC power cord.
• Make sure [USB Functionality] is set to [Auto] or [On] (see page 38).
• Check to see if [Audio Mute] is activated.
• Check to see if [Audio Volume] is set to a minimum.
• Check to see if the computer supports an audio signal through DisplayPort, HDMI or USB-C.
• Check to see if the headphones cable is properly connected when using headphones.
• Check to see if headphones are connected if not using headphones.
• Check to make sure that the USB cable is properly connected. Refer to your USB device User’s Manual.
• Check that the USB upstream port on the monitor is connected to the USB downstream port on the computer, and make
sure the computer is ON.
• Make sure the USB-C cable is properly connected.
• Check the [USB Functionality] settings (see page 38).
• Turn the power switch off and on again.
• Make sure [USB Functionality] is set to [Auto] or [On] (see page 38). Please refer to “Recovering from no image” on
page 21.
• Check if the connected USB-C device complies with DisplayPort Alt Mode on USB Type-C.
• Check if the USB-C cable complies with SuperSpeed USB.
• Make sure [USB Functionality] is set to [On] (see page 38).
• Check if the connected USB-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 over current on 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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