Question about ViewSonic N3020W 30 in. HDTV-Ready LCD Television
My TV has a blue screen. The remote control does not communicate with TV. The butonns on the side do not work. I have taken this TV to a small repair shop but they said they could not get parts from View Sonic. They told me it was the power supply. Does any one have this problem ? Is it worth geting fixed? Where would I get a power supply if this is the problem?
If an LCD TV has sound but no picture do the following:
Use the source button to ensure that source is not set to the wrong input.
Try unplugging power cord for ten minutes, to ensure it is not a setting problem.
Check all the video cables at the back of TV.
Check Light /Color settings.
If problem persist and does not depend on external receiver or settings, then it is likely an internal fault.
If it has sound but no picture then one of the following parts is faulty, and must be tested and replaced:
Theinverter is the high voltage board that provides variable power to thebacklight lamp. This is the most common. When inverter is faulty youcan get no picture, or a very dim picture that can only be seen bypointing a torch light with a 45 degree angle on the LCD surface fromvery near distance.
The inverter must be tested by reading voltages with a multimeter.
The LCD ribbon cable/LCD display and connectors.
Thisis quite uncommon, but happens. If the TV had been hit or moved the LCDcable may have slipped out, or the LCD connector may be damaged.
The LCD controller board.
Thisis the board that controls the video signal, it is difficult to test,as there is need to read determined values on IC pins. To test thisboard you need to purchase a service manual and follow thetroubleshooting diagrams on service manual.
Input/Output Signal boards.
This are the boards where youconnect the video and audio cables, if a signal board is defective,then you may get no picture on particular inputs located on faultyboard.
If under warranty contact the manufacturer ringing the number on the user manual.
If you want to repair at your own expenses, just locate any good qualified repairer.
If you want to DIY you find parts here,
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Posted on Jul 18, 2009
When menu is locked this means the child lock function has been activated on the system. This is usually to stop kids from tampering the remote and adjusting settings. The procedure for doing this differs from unit to unit Refer to your user manual to determine the procedure for unlocking the unit.
Hope this solution has been helpful?
Posted on Sep 24, 2010
You will need to open it cant fix it from out side better bring it to a technical center i can give you advices what to do when you got it open but i`m not edvising you to do this if you have no soldering skills
Posted on Sep 24, 2010
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