ViewSonic EP5540T User Manual

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12. 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 Possible Solutions
Remote control does not operate • The batteries could be weak. Replace the batteries.
• Check the orientation of the batteries.
• Make sure the power cord is plugged in.
Video and Audio
Problem Possible Solutions
No picture (screen not lit), No
sound
• Make sure the power cord is plugged in.
• Press POWER on the display or on the remote control.
Dark, poor or no picture (Screen
lit), good sound
• Select a proper picture mode.
• Adjust the brightness in the video setting.
No color/dark picture/abnormal
color
• Adjust the color saturation in the video setting.
Dotted lines or stripes • Move the display away from noise sources such as cars, neon
signs, or hair dryers.
Good picture, no sound • The sound may be muted. Press MUTE again to cancel.
Audio noise • 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.
General
Problem Possible Solutions
Some items can’t be accessed • If a setting option appears in gray, this indicates that the settings
option is unavailable in current input mode.
Remote control command is not
effect in some cases.
• 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.
Control buttons do not operate • Disconnect the power cord and wait for a few seconds. Then re-plug
the power cord and turn on the unit again.
POWER button responds slowly
after power is connected.
• When you push POWER SWITCH to power on the display, in about
3 seconds the POWER button starts to respond after pressed.
Note: If your problem is not solved, turn your unit off and then on again.
Cautions: Never attempt to repair a defective display yourself.

ViewSonic EP5540T Specifications

General

Package depth	618 mm
Package width	983 mm
Package height	2016 mm
Package weight	85000 g
RMS rated power	20 W
Number of built-in speakers	2
DVI port	No
USB version	2.0/3.2 Gen 1 (3.1 Gen 1)
USB ports quantity	4
Ethernet LAN (RJ-45) ports	1
Panel life	30000 h
Response time	6 ms
Display diagonal	54.6 \
Display brightness	400 cd/m²
Display technology	LED
Native aspect ratio	16:9
LED backlighting type	Direct-LED
Contrast ratio (typical)	1200:1
Cables included	AC
Internal memory	2 GB
Computer system type	System on Chip (SoC)
Internal storage capacity	16 GB
Operating system installed	Android 5.0.1
Purpose	Universal
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	20 - 80 %
Product color	Black
Product design	Interactive flat panel
Placement supported	Indoor
Certification	FCC/cTUVus/BSMI
AC input voltage	100-240 V
Power consumption (standby)	0.5 W
Power consumption (typical)	117 W

Weight and Dimensions

Depth	450 mm
Width	820 mm
Height	1900 mm
Weight	70000 g