HP LD4700, LD4200 manual Troubleshooting, Solving Common Problems, Problem Possible Cause Solution

A Troubleshooting

Solving Common Problems

The following table lists possible problems, the possible cause of each problem, and the recommended solutions.

Problem	Possible Cause	Solution
No image is displayed.	Power cord not connected.	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.
Power is on, power indicator is blue, but	Screen needs adjustments.	Adjust brightness and contrast again.
the screen appears extremely dark.		Backlight may need repair.
Power indicator is amber.	Monitor in power saving mode.	Move the mouse or press any key on
		the keyboard.
		Turn off equipment and then back on.
Out of Range message appears.	Input signal is out of frequency range.	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 33