Mitsubishi Electronics HC7900DW Troubleshooting, No image appears on the screen Problem Solution

Page 47

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 41.)

 

 

 

 

“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 may be jagged

•

Make sure if the cable is firmly

plugged into the connecting terminal.

 

when connecting the

• To accept and display 1080p signals on the screen, make sure to use a high-speed

projector using the

 

HDMI cable that can transmit 1080p signals.

 

HDMI cable.

• When a distributor or an AV amplifier is connected using an HDMI cable, check that

“NO SIGNAL” is

 

the distributor or the AV amplifier complies with HDMI1.3 or higher (Deep

Color).

displayed when

 

When displaying 3D images, check that the distributor or the AV amplifier

complies

connecting the

 

with HDMI1.4 or higher (3D display).

 

projector using the

 

 

 

 

HDMI cable.

 

 

 

 

 

 

 

 

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 40.)

 

 

 

 

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 36.)

dark.

• Replace the lamp. (See page 42.)

 

 

 

 

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 40.)

•Set OVER SCAN in the SIGNAL menu to 100%. (See page 34.)

•Set KEYSTONE in the INSTALLATION menu to 0. (See page 32.)

•Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 36.)

•Adjust the projector and the screen so that they are perpendicular to each other. (See page 10.)

White dots are seen

• This symptom is normal for a DLP™ projector and is not a malfunction. (A very small

on projected images.

number of pixels may stay lit or out, but such symptom is not a malfunction. Pixels of

Black dots are seen

99.99% or more are effective.)

on projected images.

 

 

 

Rainbow effect is seen

• This is due to color breaking noise that occurs in a DLP™ system and is not a

on projected images.

malfunction.

EN-47

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Contents HC7900DW Risk of Electric Shock Do not Open Contents Important safeguards Important safeguards What’s included in the box Inserting the batteries into the remote controlRemoving the batteries from the remote control Preparing your projectorControl panel Preparing your projectorOverview Picture quality selection buttons Remote controlPicture quality adjusting buttons Reception angle Using the remote controlOperational range of the remote control Reception distanceScreen size and projection distance Setting up your projectorSetting up the screen When the aspect ratio of the screen isWhen the aspect ratio of the image is Setting up your projectorWhen the aspect ratio of the screen is 2.351 CinemaScope Correcting skewed or distorted image Adjusting the position of the projected imageWhen fine streaks are seen on projected images When projected images are distorted to a trapezoidRear projection Front projection, ceiling mountingTrigger terminal Preparation Connecting the projector to video equipmentViewing video images Basic home theater system connectionConnection for video equipment having an Hdmi terminal Connecting to video equipment having a Hdmi terminalViewing video images Connecting to a DVD player or Hdtv decoder Plugging in the power cordProjecting images To stop projecting ZOOM1 ZOOM2 Stretch ANAMORPHIC1 ANAMORPHIC2 Setting the aspect ratioWith the Feature menu See page 29 for menu setting How to change the settingsWith the remote control About DDC Connecting the projector to a computerPlugging the power cord Viewing computer imagesViewing computer images Auto Position button When connecting to a notebook computerSetting of the resolution Example of the setting procedure for external output3D images viewing Installing the 3D emitterViewing 3D images Usable 3D glasses and 3D emitterWith the 3D menu To stop the signal emitted from the 3D emitter temporarilyViewing 3D images To convert 2D images to 3D imagesEN-27 Menu operation You can make various settings using the displayed menusPress the  or  button to select a menu to use How to set the menusMenu operation Image menu Menu itemsScreen Size Setting Function Advanced MenuSetup Auto Picture Menu ResetInstallation menu Feature menu Signal menu Information menu With the Image menu Adjusting projected imagesTo adjust the brightness Contrast To adjust the color Color and TintTo enable the stored color temperature Adjusting projected imagesTo adjust the tone of white Color Temp About color temperatureTo use BrilliantColor To change the Iris mode With the remote controlTo optically brighten or darken projected images Iris BLUEMAGENTARED To adjust the ratio of change in brightness Gamma ModeTo enable the stored gamma mode To use Color ManagementLPF Progressive filter To adjust the vertical positionTo cancel the password function Advanced featuresPassword function To enable the password functionReplacing the lamp Interval of lamp replacementReplacing the lamp When the projector is mounted to the ceilingReset of the lamp operation time Cleaning of the lens MaintenanceCleaning of the projector and the vents No image appears on the screen Problem TroubleshootingImages are not displayed correctly Problem Solution TroubleshootingNo image appears on the screen Problem Solution Others Problem Solution EN-49 EN-50 Normal condition IndicatorsPower Status Condition Condition Possible SolutionSerial SpecificationsDimension drawings unit mm Hdmi3D supported signals SpecificationsSupported input signals VLT-HC7800LP ConnectorsSeparately sold items COMPUTER/COMPONENT Video Hdmi 1, HdmiZusho Baba, Nagaokakyo-City, Kyoto Japan
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