35 TroubleshootingIs the prompt on the display illuminated in orange?If the LED is illuminated in orange, the power ma nagement mode is active. Press any button on the computer keyboard or move the mouse. If that does not help, check the signal cable connectors. If any pin is bent or broken off, plea se contact your dealer to get necessary support.Is the prompt on the display not illuminated at all?Check the power supply mains socket, the ex ternal power supply and the mains switch.The image is distorted, flashes or flickers:Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions.You are running the monitor at its native resolution, but the image is still distorted.Images from different input sources may appear di storted or stretched on the monitor running at its native resolution. To have the optimal display performance of each type of input sources, you can use the "Display Mode" function to set a pr oper aspect ratio for the input sources. See Display Mode on page 28 for details.The image is displaced in one direction:Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions.The OSD controls are inaccessible:•To unlock the OSD controls when the OSD is pr eset to be locked, press and hold the "MENU" key for 15 seconds to enter the "OSD Lock" option and make changes. •Alternatively, you may use the or keys to select "NO" in the "OSD Lock" submenu from the "OSD Settings" menu (under SYSTEM), and all OSD controls will be accessible.No sound can be heard from the built-in speakers:•Check whether Line In is properly connected.•Increase the volume (volume may be muted or too low).•Remove your headphone and/or external speakers. (If they are connected to the monitor, the built-in speakers are automatically muted.)No sound can be heard from the connected external speakers:•Remove your headphone (if the headphone is connected to the monitor).•Check whether Line Out is properly connected.•If the external speakers are USB-powered, check whether the USB connection is OK.•Increase the volume (volume may be muted or too low) on the external speakers.Sound cannot be muted:•Restart your computer.•Update the graphics and/or audio driver.
