Troubleshooting - Nevir NVR-7402-28HD-N User Manual

7.Troubleshooting

Carry out the problem-solving measures described in the following section before contacting
customer support. Turn off the device immediately as soon as you suspect a malfunction and
unplug the power plug. Do not attempt to repair the device yourself.
S Y M P T O M
LCD screen stays
Dark.
There is no sound
There is no picture or
picture move up and
down unsteady.
The remote control does
not work.
Screen cut short at HDMI pc model
When using HDMI input 1080P from a PC, please set the "Aspect Ratio" or
"PC mode"/"Screen mode" on TV to "Point to Point", "Under scan" or "Just
scan" etc. so the TV can fully display without cut short
Other Notes:
Static or other external interfere may cause the player to behave abnormally. In this occurs,
unplug the power-supply cord from the outlet and plug it in again to reset the player. If the
problems persist, then please disconnect the power and consult a qualified technician.
Make sure the unit is turned on and the connections are correct.
Make sure the power adapter is correctly connected.
Make sure the system connection is correct.
Mack sure the power of speaker is turned on.
Check if the connections with the external AV signal source are
correct.
Correctly set the items in the picture menu.
Check if the video type input signal is not corresponding to the
unit.
Make sure the unit is turned on and in correct video type.
Make sure there are no obstructions between the remote control
and the unit.
Make sure the remote control is pointing at the unit.
Make sure the batteries are inserted or the polarity is correct.
Make sure the batteries are not weak.
Replace the weak battery.
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C H E C K T I E M