Operation Manual

24
CHAPTER 3:
Troubleshooting
If you are experiencing any problem with your
display, before calling for service, please
review the following troubleshooting tips.
There is no picture or sound.
• Is the power on?
• Make sure correct input mode is selected.
• If any external equipment is connected, make
sure the equipment is operating (playing back).
Remote control does not work.
• Is the battery inserted with polarity (+,-)
aligned?
• Is the battery exhausted?
• Point the remote control unit toward the
monitor’s remote control sensor.
Sound from left and right speakers is
reversed. Sound is heard from only one
side.
• Are audio cables connected properly?
There is a picture but no sound.
• Is the sound muted? (See page 10.)
• Make sure the volume is not set to minimum.
(See page 10.)
• Are audio cables connected properly?
Unstable video.
• The signal may be incompatible. (See pages
…)
The video from the HDMI input terminal
does not appear properly.
• Is the HDMI cable HDMI standard compliant?
The monitor will not work with cables that are
not standard compliant.
• Is the input signal compatible with this
monitor? (See pages …)
The video from D-sub input terminal does
not appear correctly.
• Is the input signal compatible with this
monitor? (See page …)
There is no picture.
• Turn on the monitor first before turning on the
computer or playback device.
Computer resolution changes
automatically.
• If you turn the power switch off and then back
on again connecting the computer with a
graphic card, the resolution may change to 640
x 480. The resolution changes back to 1920 x
1080 according to the following steps.
- Disconnect and connect the video cable.
- Reboot the computer.
The touch panel does not respond.
• Is the USB cable connected properly?
The response of the touch screen is slow.
Some parts of the screen do not respond.
A different place is touched
• Is the screen exposed to direct sunlight or
other strong light?
The touch panel uses infrared rays and thus
may not operate correctly.
• Is there an obstacle between the infrared
transmitter/receiver and the touch pen or your
finger?
An obstacle will prevent correct operation. If
your fingers or a sleeve are too close to the
screen, correct operation will not be possible.
• Is the infrared transmitter/receiver dirty?
Gently wipe off any dirt with a soft cloth.
• If the touch panel is touched with a small tip
less than about 5/16 inch (8 mm) x 5/16 inch (8
mm), the touch may not be detected by
infrared and correct operation will not take
place.
• When starting your computer or connecting
the USB cable, do not touch the touch panel. If
you touch the touch panel, this may be
detected as an element failure in the infrared
transmitter/receiver and incorrect operation will
result.
• When two touch pens are used, it may not be
possible to write correctly.