Troubleshooting - ViewSonic EP5542 User Manual

11.

Troubleshooting

If, after reading these operating instructions, you have additional questions related to the use of your display,
please call the services center in your local area.
Before calling service, please check the symptoms and follow suggested solutions.
Remote Control
Problem
Remote control does not operate
Video and Audio
Problem
No picture (screen not lit), No
sound
Dark, poor or no picture (Screen
lit), good sound
No color/dark picture/abnormal
color
Dotted lines or stripes
Good picture, no sound
Audio noise
General
Problem
Some items can't be accessed
Remote control command is not
effect in some cases.
Control buttons do not operate
POWER button responds slowly
after power is connected.
Note: If your problem is not solved, turn your unit off and then on again.
Cautions: Never attempt to repair a defective display yourself.
Possible Solutions
• The batteries could be weak. Replace the batteries.
• Check the orientation of the batteries.
• Make sure the power cord is plugged in.
Possible Solutions
• Make sure the power cord is plugged in.
• Press POWER on the display or on the remote control.
• Select a proper picture mode.
• Adjust the brightness in the video setting.
• Adjust the color saturation in the video setting.
• Move the display away from noise sources such as cars, neon
signs, or hair dryers.
• The sound may be muted. Press MUTE again to cancel.
• Communication problems may occur if infrared communication
equipment (e.g., infrared cordless headphones) is used near the
display. Move the infrared communication equipment away from the
display until the noise is eliminated.
Possible Solutions
• If a setting option appears in gray, this indicates that the settings
option is unavailable in current input mode.
• During the timing of USB device detection (i.e. when the display is
turned on with USB device connected, or when you plug in USB
device during display working), the display may not act by remote
control buttons in such case. Wait some time, then it is OK.
• Disconnect the power cord and wait for a few seconds. Then re-plug
the power cord and turn on the unit again.
• When you push POWER SWITCH to power on the display, in about
3 seconds the POWER button starts to respond after pressed.
24