Question about ViewSonic N2750w 27 in. HD-Ready LCD Television
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Posted on Jan 02, 2017
SOURCE: T.V. abducted by aliens!
The controller eprom is in a fatal error and cannot be repaired. The pink indicates that a channel in the LVDS interface is gone and that cannot be repaired. This most likely is caused by a failure in the LCD module itself which then shorted out the driver on the main board. If your unit is under warranty, take it in as the LCD panel itself should be covered.
Posted on Jul 13, 2008
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
You need to take the back off the set, with the power off, turn it on, then probe around with a long, wooden chopstick until you find the problem.
Posted on Apr 05, 2010
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