Mitsubishi Electronics HC6800 user manual Troubleshooting continued, Problem, Solution

Troubleshooting (continued)

No image appears on the screen. (continued)

Problem	Solution
The screen for	• PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT to
entering the password	enable the password lock.
appears.	 Enter the password or contact the person in charge of management of the
	projector. (See page 35.)
“NO SIGNAL” is	• Turn on the power of the connected device, or check whether there is something
displayed.	wrong with the connected device.
	• Check whether the external device output signals. (Check this especially when the
	external device is a notebook computer.)
	• Check that the cable connected to the external device isn’t defective.
	• Check that the projector is connected to the external device using the correct
	terminals.
	• Check that the connected device is correctly selected as the input source.
	• When an extension cord is being used, replace it with the supplied cable and check
	whether images are projected correctly. If images are projected correctly, use an RGB
	signal amplifier along with the extension cord.

Images are not displayed correctly.

Problem	Solution
Projected images are	• Check that the cable connected to the external device isn’t intermittent.
shaking.	• Connect the cable’s plug with the external device’s connector firmly.
Projected images are	• Press the AUTO POSITION button.
displaced.	• Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL
	menu. (See page 34.)
Projected images are	• Adjust the projector and the screen so that they are perpendicular to each other. (See
distorted.	page 10.)
Projected images are	• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 31.)
dark.	• Replace the lamp. (See page 36.)
Projected images are	• Adjust the focus. (See pages 18 and 23.)
blurred.	• Clean the lens.
	• Press the t or u button on the remote control to eliminate flicker.
	• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 34.)
	• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 31.)
	• Adjust the projector and the screen so that they are perpendicular to each other. (See
	page 10.)
Afterimages persist on	• This phenomenon is improved by keeping projecting an evenly bright image. (Such
the screen.	“image burn-in” phenomenon where afterimages persist on the screen may occur if a
	stationary image is kept displayed on the screen for a long time.)
Red, blue, and	• This phenomenon is unique to LCD projector and isn’t a product malfunction.
green dots appear in	(A small number of pixels always stay on or off, which are not malfunctions. More than
projected images.	99.99% of the pixels are effective.)
Black dots appear in
projected images.
Fine streaks are seen	• This is due to interference with the screen surface and is not a malfunction. Replace
on projected images.	the screen or displace the focus a little.
	• Vertical or horizontal streak noise may appear on the projected image, depending on
	the type of the DVD player or game console you use. In such a case, you can reduce
	such streak noise by enabling the LPF. (See page 29.)
Projected images	• Connect the plugs of the cables to external devices securely.
become wavy.	• Keep the projector away from devices that emit interfering radio waves.
Hue is not appropriate.	• Check that the cables connected to the external devices are not broken.
Tint in projected	• Check that COMPUTER INPUT in the SIGNAL menu is correctly set. (See page 29.)
images is incorrect.	• Check that the cable connected to the external device isn’t broken.

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