Acer CB271HK User Manual - Page 29
User controls, VGA mode, DVI / HDMI mode
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Troubleshooting Before sending your LCD monitor for servicing, please check the troubleshooting list below to see if you can self-diagnose the problem. DVI / HDMI mode Problem No picture visible LED status Blue Off Remedy Using the OSD, adjust brightness and contrast to maximum or reset to their default settings. Check the power switch. Amber Check if the AC power cord is properly connected to the monitor. Check if the video signal cable is properly connected at the back of monitor. Check that the computer system is switched on and in power saving/ standby mode. Problem No picture visible LED status Blue Off Remedy Using the OSD, adjust brightness and contrast to maximum or reset to their default settings. Check the power switch. Amber Check if the AC power cord is properly connected to the monitor. Check if the video signal cable is properly connected at the back of monitor. Check that the computer system is switched on and in power saving/ standby mode.