Troubleshooting - A2T -55W21K-U Instruction Manual

Troubleshooting

Fault
Dot line or stripe
interference on the screen
Slow operation or not
working
No colours on screen
No accompanying sound
No display on PC or prompt
of no signal input or
flickering red indicator
Image cannot fill the full
screen or exceeds the
screen or there is a vague
display on PC
Short remote control
distance or remote
control failure
Network access failure
Choppy online video
Android OS has crashed
Possible Cause
• The signal is interfered, such as cars, neon
lights and electric hair dryers
• Too many programs maybe running
• Color saturation is too low
• The volume is too low
• Mute is activated
• The signal cable is loose or disconnected
• Improper adjustment
• Improper display mode
• The remote control reception window is
obstructed
• Low battery of remote control unit
• Wrong configuration of network param-
eters
• Improper network connection
• Network service is not available
• The network bandwidth is low
• Several movies or other contents are
downloaded at the same time
• Many PCs share the same network
• Many programs are running at the same
time
• External environment (such as lightning
and static) disturbs the normal operation
Solution
• Do not use the electric hair dryer near-
by the product and adjust the antenna
orientation to reduce interference
• Close programs that use a lot of
memory and restart the touchscreen.
• Enter "Image" submenu to increase
color saturation
• Adjust to the suitable volume
• Press the "Mute" key on the remote
control to disable the mute mode
• Check whether the signal cable is loose
or disconnected or not - connect it
again if so
• Use the function of automatic adjust-
ment
• Enter "PC Image Adjustment" to adjust
the horizontal or vertical position
• Use the recommended mode
• Move away the articles to avoid ob-
struction
• Replace with new batteries
• Inquire the network administrator to
acquire available network IP address
and other parameters
• Check whether the network is
connected normally or not
• Consult the network service provider
• Update your network bandwidth to a
higher level
• Please attempt to replace with another
web sites for better resources
• Disconnect the power supply for the
product; wait for 1-2min and then
connect to power supply again and
restart
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