Troubleshooting - BenQ SL6501 User Manual

88 Cleaning and Troubleshooting

Troubleshooting

Symptom
No picture is displayed
Interference displayed on the
display or audible noise is
heard
Color is abnormal
Picture is distorted with
abnormal patterns
Display image doesn't fill up
the full size of the screen
Can hear sound, but no
picture
Can see picture but no sound
is heard
Some picture elements do not
light up
Possible Cause
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.
Caused by surrounding electrical
appliances or fluorescent lights.
The signal cable is not connected
properly.
1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the display.
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.
Improperly connected source signal
cable.
1. Improperly connected source
signal cable.
2. Volume is turned all the way down.
Mute is turned on.
3.
4. No external speaker connected.
Some pixels of the display may not turn
on.
Remedy
1. Plug in the power cord.
2. Make sure the power switch is
switched on.
3. Connect a signal connection to
the display.
Move the display to another location to
see is the interference is reduced.
Make sure that the signal cable is
attached firmly to the back 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.
Use the Zoom mode or Custom zoom
function in the Screen menu to fine
tune display geometry and time
frequency parameter.
Make sure that both video inputs and
sound inputs are correctly 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.
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.