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8. Appendix
Common Problems & Solutions
(
→
“Power/Status/Light
Indicator”
on
page
Problem
Check These Items
Does not turn on or shut
down
•
Check
that
the
power
cord
is
plugged
in
and
that
the
power
button
on
the
projector
cabinet
or
the
remote
control
is
on.
(
→
pages
,
•
Check
to
see
if
the
projector
has
overheated.
If
there
is
insufficien
ventilation
around
the
projector
or
if
the
room
where
you are presenting is particularly warm, move the projector to a cooler location
�
•
The
light
may
fail
to
light.
Wait
a
full
minute
and
then
turn
on
the
power
again.
• Set
[FAN
MODE]
to
[HIGH
ALTITUDE]
when
using
the
projector
at
altitudes
approximately
5500
feet/1700
meters
or
higher.
Using
the projector at altitudes approximately 5500 feet/1700 meters or higher without setting to [HIGH ALTITUDE] can
cause the projector to overheat and the projector could shut down. If this happens, wait a couple minutes and turn on
the projector.
(
→
page
)
Will turn off
•
No picture
•
Use
the COMPUTER1, HDMI1, HDMI2, VIDEO or USB-A button on the remote control to select your source (COMPUTER,
HDMI1, HDMI2, VIDEO or USB-A)
. (
→
page
) If there is still no picture, press the button again.
•
Ensure
your
cables
are
connected
properly.
•
•
•
•
Be
sure
to
connect
the
projector
and
notebook
PC
while
the
projector
is
in
standby
mode
and
before
turning
on
the
power
to the notebook PC
�
In most cases the output signal from the notebook PC is not turned on unless connected to the projector before being
powered up
�
* If the screen goes blank while using your remote control, it may be the result of the computer’s screen-saver or power
management software
�
•
See
also
the
�
Picture suddenly be-
comes dark
•
Check
if
the
projector
is
in
the
Forced
ECO
mode
because
of
too
high
ambient
temperature.
If
this
is
the
case,
lower
the
internal temperature of the projector by selecting [HIGH] for [FAN MODE]
�
(
→
page
)
Color tone or hue is
unusual
•
•
Image isn’t square to the
screen
•
•
Picture is blurred
•
Adjust
the
focus.
(
→
page
)
•
•
Image is scrolling verti-
cally, horizontally or both
•
Check
the
computer’s
resolution
and
frequency.
Make
sure
that
the
resolution
you
are
trying
to
display
is
supported
by
the projector
�
(
→
page
•
Remote control does not
work
•
Install
new
batteries.(
→
•
Make
sure
there
are
no
obstacles
between
you
and
the
projector.
•
Stand
within
22
feet
(7
m)
of
the
projector.
(
→
)
Indicator is lit or blinking
•
Cross color in RGB mode
•
•
For
more
information
contact
your
dealer.
•
Ensure that the [OFF TIMER] or [AUTO POWER OFF] is
off.
(
→
)
Reset the settings or adjustments to factory preset levels using the [RESET] in the
Menu.
(
→
page
)
Use menus to adjust the brightness and contrast
.
(
→
page
Enter your registered keyword if the Security function is enabled
.
(
→
page
)
Check if an appropriate color is selected in [WALL COLOR]. If so, select an appropriate option
.
(
→
page
)
Adjust [HUE] in [PICTURE]
.
(
→
page
Reposition the projector to improve its angle to the screen
.
(
→
page
)
Use the Keystone correction function to correct the trapezoid distortion
.
(
→
Reposition the projector to improve its angle to the screen
.
(
→
page
Ensure that the distance between the projector and screen is within the adjustment range
.
(
→
)
Adjust the computer image manually with the Horizontal/Vertical in the [IMAGE OPTIONS]
.
(
→
)
See the POWER/STATUS/LIGHT indicator
.
(
→
Press the AUTO ADJ. button on the projector cabinet or the remote control
.
(
→
page
Adjust the computer image manually with [CLOCK]/[PHASE] in [IMAGE OPTIONS] in the menu
.
(
→
Содержание UM383WL
Страница 122: ...NEC Display Solutions Ltd 2019 7N952943...
