Mitsubishi Electronics HC7900DW Troubleshooting, No image appears on the screen 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 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