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• have Installation adjustment been
performed?
• Check if the signal is appropriate
(scanning frequency, etc.), and input
the appropriate signal.
• For installation, consult the dealer
where you purchased the projector or a
local service center.
• Input separate sync signals for vertical
sync (V) and horizontal sync (H)
signals.
• Set the source setting to AUTO. If the
problem still persists, set it to the
correct dedicated source (forced
mode).
• Input signals with little jitter or
distortion.
• Press the remote control’s AV HIDE
button to turn video on.
Symptom Probable cause Corrective action Page
During video replay,
video image
sometimes is
disturbed
• Is the correct broadcast system (color
system) selected?
• Set the broadcast system (color
system) to AUTO.
Image color is poor or
image is disturbed
• Is picture quality (color desity, etc.)
adjusted correctly?
• Adjust picture quality on the menu.
• Are signals (scanning frequency, etc.)
to connected devices appropriate?
Specific colors fail to
be displayed
• Set the source setting to AUTO. If the
problem still persists, set it to the
correct dedicated source (forced
mode).
• Is the source setting correctly selected?
Isn’t a wrong source (forced mode)
selected?
• Check specifications of both signal
being input and video input card.
• Are specifications of the signal being
input matching those of the video input
card?
• Check cable connections.• Is the input cable connected correctly?
The upper part of the
video image bows or
distorts.
• While computer system signal is input,
isn’t a sync signal for composite sync
(Cs) or G on sync being input?
• Is the source setting correctly selected?
Isn’t a wrong source (forced mode)
selected?
• Isn’t signal with much jitter or skew
distortion being input to a video deck?
• Check the used lamp hours on the
menu, and if the lamp life is near its
end, consult the dealer where you
purchased the projector or a local
service center.
• Has the lamp's life come to its end?
• Check the setup contents been
changed.
• Have the channel's setup contents
been changed?
• Have the channel's setup contents
been changed?
• Check the setup contents of the
channel and correct them if necessary.
• Is sync signal being input correctly?
• Check sync signal and related
connection.
• Has the projector been moved from its
installed place?
• Check the installed position.
• Are all color video signals being input? • Check signals and connections.
The projection
position on the screen
has shifted.
Video image suddenly
go out.
• Aren’t video turned off by pressing the
remote control’s AV HIDE button?
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44 ~ 46
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60
10
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44 ~ 46
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47 ~ 51
10
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12
19 ~ 23
Troubleshooting (Cont.)
M4000LU p.61-63./1 00.2.23, 10:49 AM62