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Appendix
55
Troubleshooting
No picture and no sound
or projector does not
start.
Sound is heard but no
picture appears (or picture
is dark).
Color is faded or poor.
Picture is blurred;
noise appears.
Picture appears but no
sound is heard.
An unusual sound is
occasionally heard from
the cabinet.
Maintenance indicator on
the projector illuminates
or blinks in red.
Problem Check
• Projector power cord is not plugged into the wall outlet.
• Power to the external connected devices is off.
• The selected input mode is wrong.
• Cables incorrectly connected to the projector.
• Remote control battery has run out.
• External output has not been set when connecting notebook
computer.
• The lamp unit cover is not installed correctly.
• Cables incorrectly connected to the projector.
• “Bright” is set to minimum position.
• Depending on the computer you are using, an image may not be
projected unless the signal output setting of the computer is
switched to the external output. Refer to the computer’s operation
manual for how to switch its signal output settings.
• Image adjustments are incorrectly set.
• Make adjustments of “Color” and “Tint” in “Picture Mode” and lower
the “Bright Boost” value.
(Video Input only)
• Video input system is incorrectly set.
• Adjust the focus.
• The projection distance exceeds the focus range.
(Computer Input only)
• Perform “Fine Sync” Adjustments (“Clock” Adjustment)
• Perform “Fine Sync” Adjustments (“Phase” Adjustment)
• Noise may appear depending on the computer.
• Cables incorrectly connected to the projector.
• Volume is set to minimum.
• When the projector is connected to an external device and the
volume is set to minimum, the sound is not output even if you turn up
the volume of the external device.
• “Speaker" is set to “Off”.
• If the picture is normal, the sound is due to cabinet shrinkage
caused by room temperature changes. This will not affect operation
or performance.
• See “Maintenance Indicators”.
Page
28
–
30
23–27
14
25
51, 52
23–27
42
–
42
46
30
20
46
46
–
23–27
32
45
–
49
29
The projector cannot be
turned on or put into the
standby mode using the
STANDBY/ON button on
the projector.
• The keylock is set.
If the keylock is set to “ON”, all the buttons are locked.
DT-100_EN_k 05.7.22, 5:56 AM55