96
Troubleshooting
Before you call for service, determine the symptoms and make a few simple checks as shown below.
Symptoms
Checks
Picture
Sound
Interference
Noisy Sound
Electrical Appliances
Cars / Motorcycles
Fluorescent light
Normal Picture
No Sound
Volume
(Check whether the mute function has been activated on the remote control.)
No Picture
No Sound
Not plugged into AC outlet
Not switched on
Picture and Brightness/Volume setting
(Check by pressing the power switch or stand-by button on the remote
control.)
No Picture
Normal Sound
If a signal with a non-applicable colour system format, or frequency is input,
only the input terminal indication is displayed.
No Colour
Normal Sound
Colour controls set at minimum level (see page 65, 66)
No remote control operations can be performed.
Check whether the batteries have discharged completely and, if they have
not, whether they were inserted properly.
Check whether the remote control sensor is exposed to an outdoor light or a
strong fluorescent light.
Check whether the remote control designed specifically for use with the unit is
being used. (The unit cannot be operated by any other remote control.)
A cracking sound is sometimes heard from the unit.
If there is nothing wrong with the picture or sound, this is the sound of the
cabinet undergoing very slight contractions in response to changes in the room
temperature. There are no adverse effects on the performance or other aspects.
The top or bottom of the picture on the screen is cut
off when I use the zoom function.
Adjust the position of the picture on the screen.
Areas at the top and bottom of the screen where
the image is missing appear when I use the zoom
function.
When using a video software program (such as a cinema size program) with
a screen wider than one in the 16:9 mode, blank areas separate from the
images are formed at the top and bottom of the screen.
Parts of the unit become hot.
Even when the temperature of parts of the front, top and rear panels has risen, these
temperature rises will not pose any problems in terms of performance or quality.
Power automatically turns off unexpectedly.
Check the settings of “No signal power off”, “PC power management”, “DVI-D power
management”, HDMI1 power management, HDMI2 power management and “No
activity power off”. Any of them may be set to “On (Enable)”. (see page 78, 83)
There is no picture displayed or sound output
sometimes.
When HDMI or DVI-D signals are input to the Display using a selector
or distributor, sound or images may not be output in the normal fashion
depending on the selector or distributor used.
The symptoms may be improved by turning the power off and on again, or by
replacing the selector or distributor.
Multi-touch operations cannot be performed.
Check if the “Setup” - “Touch screen settings” is set to “On”. (see page 73)
The touch panel is an optical device that uses infrared rays. Incident light that
contains large quantities of infrared rays can prevent proper functioning. Move
light sources as far away from the touch panel as possible.
Fluorescent light: Does not produce infrared light, so it does not cause
problems.
Sunlight: Locate the touch panel where it is not exposed to direct sunlight.
White candescent light: Contains the most infrared light and can readily affect
the touch panel. Move light sources as far away from
the touch panel as possible.
Strong external noise can cause the microcomputer inside the touch panel to
malfunction, therefore keep noise sources as far away as possible.
Whirring sounds can be heard from the display unit.
The display unit is fitted with a cooling fan to dissipate heat generated during
normal use. The whirring sound is caused by rotation of the fan and is not a
malfunction.