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Problem
Possible
Solution
Remote control unit
does not operate
z Make sure the directions of batteries are inserted
correctly referring to the user guide.
z Batteries could be weak or dead. Replace by new
batteries.
z Is a fluorescent light illuminated near the remote
control sensor?
z The path of the remote control beam may be
blocked. Make sure the path is clear and that the
remote control is aimed at the remote control sensor
on the TV.
z Press the POWER button on the remote control to see
if you can turn on the TV.
z Press MENU button on the remote control to see if
there is a MENU shown on the screen.
z Press only one button at a time and it is the correct one
for the operation you want to perform.
Unit cannot be
operated
z External influences such as lightning or static
electricity may cause improper operation. In this case,
operate the unit after first turning on the power of the
LCD TV and the AVC System, or unplug the AC cord
for 1 to 2 minutes, then replug again.
Power is cut off
suddenly
z Is the sleep timer set in advance?.
z Is there no signal in PC mode or HDMI mode?
z The internal temperature of the unit has increased.
Remove any objects blocking the vent or clean as
necessary.
No CATV reception (or
no reception above
CH13)
z Is the AIR/CABLE option set correctly? Please set the
AIR/ CABLE option to CABLE referring to the user
guide.
z CATV is connected improperly or not connected;
please check all the CATV connections.
z The cable TV service is interrupted; please contact
your cable operator.
Picture is cut off / with
sidebar screen
z Is the image positioned correctly?
z Are screen mode adjustments such as picture size set
correctly?
z Press WIDE button repeatedly on the remote control to
see if you can get the picture you prefer.
30
Contact ViewSonic service team at: http://www.ViewSonic.com or call our service team: United States 1-800-688-6688, Canada 1-866-463-4775
ViewSonic
N4290p/
1
4790p
ENGLISH