BenQ PL490, Руководство пользователя

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Cleaning and Troubleshooting 46
Troubleshooting
Symptom Possible Cause Remedy
No picture is displayed 1. The power cord is disconnected.
2. The main power switch on the
back of the display is not switched
on.
3. The selected input has no
connection.
4. The display is in standby mode.
1. Plug in the power cord.
2. Make sure the power switch is
switched on.
3. Connect a signal connection to
the display.
Interference displayed on the
display or audible noise is
heard Caused by surrounding electrical
appliances or fluorescent lights.
Move the display to another location to
see is the interference is reduced.
Color is abnormal The signal cable is not connected
properly. Make sure that the signal cable is
attached firmly to the back of the
display.
Picture is distorted with
abnormal patterns 1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the display.
1. Make sure that the signal cable is
attached firmly.
2. Check the video signal source to
see if it is beyond the range of the
display. Please verify its
specifications with this display’s
specification section.
Display image doesn’t fill up
the full size of the screen
1. The zoom mode is not set
correctly.
2. Scan Mode may be set incorrectly
to underscan.
3. If the image exceeds the screen
size, Scan Mode may need to be
set to Underscan.
Use the Zoom mode or Custom zoom
function in the Screen menu to fine
tune display geometry and time
frequency parameter.
Can hear sound, but no
picture Improperly connected source signal
cable. Make sure that both video inputs and
sound inputs are correctly connected.
Can see picture but no sound
is heard
1. Improperly connected source
signal cable.
2. Volume is turned all the way down.
3.
Mute
is turned on.
4. No external speaker connected.
1. Make sure that both video inputs
and sound inputs are correctly
connected.
2. Press or button to hear
sound.
3. Switch MUTE off by using the
button.
4. Connect external speakers and
adjust the volume to a suitable
level.
Some picture elements do not
light up Some pixels of the display may not turn
on. This display is manufactured using an
extremely high level of precision
technology: however, sometimes some
pixels of the display may not display.
This is not a malfunction.