Troubleshooting
No power
Make sure power button (or switch) is ON.
Make sure A/C power cord is securely connected to the LCD TV.
Plug another electrical device (like a radio) into the power outlet to verify that the outlet is supplying proper voltage.
Power is ON but no screen image
Make sure the video cable supplied with the LCD TV is tightly secured to the video output port on the back of the Video source. If the other end of the video cable was not attached permanently to the LCD TV, tightly secure it to the LCD TV.
Adjust brightness and contrast.
Check Source settings.
Make sure the signal source is compative with the LCD TV.
Wrong or abnormal colours
If any colours (red, green, or blue) are missing, check the video cable to make sure it is securely connected. Loose or broken pins in the cable connector could cause an improper connection. 
Connect the LCD display to another Video source.
Control buttons do not work
E
Press only one button at a time.
N
G Snow appears on screen
L
Check your antenna connection.
I Check TV/CATV selection.
S
HNo Sound
Check your audio connection in accordance with Video source.
Press Mute again, so that Mute disappears from the screen.
Check you NICAM settings.
Press the Volume + key on your remote controller.
Remote control doesn’t work
Make sure batteries been inserted correctly.
Batteries could be weak, replace batteries.
NO picture in PC mode
Set PC to “1024 x 768” or “1280 x 1024” @ 60 Hz signal timing.
NO SCART
Check your SCART settings for composite video input/ output, RGB inputs and stereo audio input/ output.
NO Teletext
Check your remote control button for Teletext function.
ViewSonic N2750w 30