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.

J Enter the password or contact the person in charge of management of the

 

projector. (See page 34.)

 

 

“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 33.)

 

 

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 30.)

dark.

• Replace the lamp. (See page 35.)

 

 

Projected images are

• Adjust the focus. (See pages 17 and 22.)

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 33.)

 

• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 30.)

 

• 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.

 

 

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 28.)

images is incorrect.

• Check that the cable connected to the external device isn’t broken.

 

 

EN-39

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Mitsubishi Electronics HC4900 user manual Troubleshooting, Images are not displayed correctly Problem Solution