Mitsubishi Electronics MH2850U user manual Troubleshooting

Troubleshooting (continued)

No image appears on the screen. (continued)

Problem	Solution
The screen for entering	• PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT	to
the password appears.	enable the password lock.
	J Enter the password or contact the person in charge of management of the projec-
	tor. (See page 33.)
“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	• Project an image containing many characters such as a help menu and press the
displaced.	AUTO POSITION button.
	• Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL
	menu. (See pages 30 and 31.)
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 28.)
dark.	• Replace the lamp. (See page 38.)
Projected images are	• Adjust the focus. (See pages 15 and 19.)
blurred.	• Clean the lens.
	• Press the W or X button on the remote control to eliminate flicker.
	• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 31.)
	• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 28.)
	• 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 dark 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.
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.
	• When the keystone adjustment is carried out, the image may not be displayed
	correctly depending on the type of input signal. This isn’t a product malfunction. In
	this case, readjust the keystone so that the amount of keystone correction is as small
	as possible.
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 26.)
images is incorrect.	• Check that the cable connected to the external device isn’t broken.
Different color tint.	• When comparing images projected by two projectors, tints in the displayed images
	may be different because of variation between their optical components. This is not a
	malfunction.
	• When comparing the image projected by this projector with those displayed on the
	television or PC monitor, tints in the displayed images may be different because of
	difference in the range of color reproducibility. This is not a malfunction.

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