Mitsubishi Electric DLP WD8700U User Manual page 70

Troubleshooting (continued)
No image appears on the screen. (continued)
Problem
The screen for
entering the password
appears.
"NO SIGNAL" is
displayed.
Images are not displayed correctly.
Problem
Projected images are
shaking.
Projected images are
displaced.
The edge of the
projected images is
not displayed.
Projected images are
distorted.
Projected images are
dark.
Projected images are
blurred.
White dots are seen
on projected images.
Black dots are seen
on projected images.
Rainbow effect is seen
on projected images.
Fine streaks are seen
on projected images.
Projected images
become wavy.
Solution
• PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT
enable the password lock.
 Enter the password or contact the person in charge of management of the
projector. (See page 58.)
• Turn on the power of the connected device, or check whether there is something
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.
Solution
• Check that the cable connected to the external device isn't intermittent.
• Connect the cable's plug with the external device's connector firmly.
• Project an image containing many characters such as a help menu and press the
AUTO POSITION button.
• Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL
menu. (See pages 39 and 40.)
• Check whether there is a wind that blows the exhausted air from the projector to the
direction of the projection lens.
• Adjust the projector and the screen so that they are perpendicular to each other. (See
page 14.)
• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 43.)
• Replace the lamp. (See page 64.)
• Decrease the temperature when the ambient temperature is high and the warning is
displayed.
• Adjust the focus. (See page 12.)
• 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 48.)
• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 43.)
• Adjust the projector and the screen so that they are perpendicular to each other. (See
page 14.)
• This symptom is normal for a DLP™ projector and is not a malfunction. (A very small
number of pixels may stay lit or out, but such symptom is not a malfunction. Pixels of
99.99% or more are effective.)
• This is due to color breaking noise that occurs in a DLP™ system and is not a
malfunction.
• This is due to interference with the screen surface and is not a malfunction. Replace
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.
• Connect the plugs of the cables to external devices securely.
• 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.
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