42
Common Faults and Solutions
Symptom
Possible Cause
Solution
The service
program fails to be
connected.
The drive program is not
correctly installed.
Install the drive program correctly.
The USB port (lead)
is not connected or is
faulty.
Change the USB lead or check if the
USB port is faulty.
The infrared tube is
blocked.
Ensure that the surrounding infrared
tubes are not blocked.
Repositioning is
required every
time the screen is
switched on.
The computer is
equipped with a recovery
card.
Disable computer protection and
perform the positioning again.
The positioning is
inaccurate.
The positioning is not
performed properly.
Press
AUTO
on the remote
controller to show the full screen,
and use the pen provided with the
screen to perform positioning again.
The cursor of the
pen is unstable
when the pen is
used.
The writing method is
incorrect.
You are advised to use the pen
rather than a finger to write. Hold
the pen as far to the nib as possible.
The angle between the pen and
screen needs to be greater than 60
degrees. Do not touch the screen
with your sleeve or wrist.
Strong light or infrared
interference exists.
Remove the interference source or
change the using environment.
The handwriting is
discontinuous. (Part
of the handwriting
cannot be
displayed.)
The writing method is
incorrect.
You are advised to use the pen
rather than a finger to write. Hold
the pen as far to the nib as possible.
The angle between the pen and
screen needs to be greater than 60
degrees. Do not touch the screen
with your sleeve or wrist.
The covering area of the
nib does not meet the
requirement or the nib is
too small.
Change the nib or use a pen with
larger covering area.
The infrared tube is
blocked.
Check if infrared tubes are blocked.
Strong light or infrared
interference exists.
Remove the interference source or
change the using environment.