Mitsubishi Electronics HC3100 user manual Troubleshooting, EN-36

Troubleshooting (continued)

No image appears on the screen. (continued)

Problem	Solution
“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 30.)
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 33.)
Projected images are	• Adjust the focus. (See pages 17 and 21.)
blurred.	• Clean the lens.
	• Press the  or  button on the remote control to eliminate flicker.
	• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 30.)
	• 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.)
White dots are seen	• This symptom is normal for a DLPTM 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 on	99.99% or more are effective.)
projected images.
Rainbow effect is seen	• This is due to color breaking noise that occurs in a DLPTM system and is not a
on projected images.	malfunction.
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.
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 27.)
images is incorrect.	• Check that the cable connected to the external device isn’t broken.
Only the motion areas	• This is caused by the computer being used. Contact the manufacturer of your
in the images supplied	computer.
from the computer
aren’t displayed.
Projected images are	• Match the output resolution of your computer with the resolution of the projector. For
obscured.	the method to change the output resolution of the computer, contact the manufacturer
	of your computer. (See page 40.)
	• Some images and texts appear obscured during the keystone adjustment. In such
	cases, use the projector without applying the keystone adjustment. (See page 18.)

EN-36