HP LD4200tm HP LD4200tm LCD Monitor User Guide - Page 49
Troubleshooting, Solving Common Problems
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A Troubleshooting Solving Common Problems The following table lists possible problems, the possible cause of each problem, and the recommended solutions. Problem No image is displayed. Possible Cause Power cord not connected. Power is on, power indicator is blue, but Screen needs adjustments. the screen appears extremely dark. Power indicator is amber. Monitor in power saving mode. Out of Range message appears. Input signal is out of frequency range. Solution Be sure the power cord is properly connected to the outlet. ● Verify that the outlet has power to it. ● Check that the fuse or breaker has not tripped or burned out. See if the power switch is turned on. May need service. Adjust brightness and contrast again. Backlight may need repair. Move the mouse or press any key on the keyboard. Turn off equipment and then back on. The signal from the PC (video card) is out of the vertical or horizontal frequency range of the monitor. Adjust the frequency range by referring to the specifications in this manual (maximum resolution: RGB - 1920 x 1080 @ 60Hz; HDMI - 1920 x 1080 @ 60Hz). NOTE: Vertical Frequency - to enable the user to watch the monitor display, screen image should be changed tens of times every second like a fluorescent lamp. The vertical frequency or refresh rate is the times of image display per second. The unit is measured in Hz. Horizontal Frequency - the horizontal interval is the time to display one vertical line. When 1 is divided by the horizontal interval, the number of horizontal lines displayed every second can be tabulated as the horizontal frequency. The unit is measured in kHz. ENWW Solving Common Problems 41