VIEWSONIC VS12078 - Manual (Page 31)

VT3245-NT/VT3745-NT/VT4245-NT
Other Information
Troubleshooting
No power
Make sure the Display and the power cord are connected correctly.
Check if you pressed POWER on the remote control unit. If the indicator in the front panel is red, press
POWER in the remote control or the front control panel.
No picture
Connect to local CATV system equipment, and make sure the signal is unlocked.
Make sure the Display and the Audio/Video signal input devices are connected correctly.
In PC (VGA) mode, the screen turns off automatically 2 minutes after no signal input detected.
In the other modes, the screen turns off automatically 15 minutes after no signal input detected.
Strange color, light color, or color misalignment
Is the room too bright? The picture may look dark in a room that is too bright.
Check the input signal setting.
No sound
Make sure the Mute function is not operated.
When signal passed by the HDMI distribution amplifier, that may result in this situation.
Remote control unit does not operate
Check if the batteries are inserted with the polarity(+,-)correctly aligned.
Check if the batteries are discharged. Please replace with new batteries.
Make sure that you do not use the remote control under strong or fluorescent lighting.
Check if there is a fluorescent light illuminated near the remote control sensor.
The path of the remote control beam may be blocked; please make sure the path is clear and that
remote control is aimed at the remote control sensor in the Display.
Power is cut off suddenly
Check if the off timer or sleep timer are set.
The unit’s internal temperature has increased. Remove any objects blocking the vents and clean them
to remove dust.
Picture is cut off /with side bar screen
Check if the image position is correct.
Check if the screen mode adjustments such as picture size are made correctly.
LCD Display does not operate
External influences such as lightning or static electricity may cause improper operation. In this case,
operate the unit after first turning on the power, or plugging the AC cord and plugging it in again after 1
to 2 minutes.
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