View sonic flat LCD TV 32' turns power off.After charging cable is disconnected it worksfor a few seconds but turns off sfter that

You can also try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..

If the problem is same with different input devices and you have ensured there are no loose contacts in power outlet, RC jack, cable and sockets, the TV needs servicing.

Try unplugging it . Wait a few seconds and plug it in again.

ther is a problem in vertical area,just a capacitor only must be replace.

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1. Use a D-SUB cable to connect the PC’s D-SUB output jack to the LCD TV’s VGA input jack. Use an audio cable to connect the PC’s audio output jacks to LCD TV’s.
2. Connect all AC power sources, before turning on the power switch of the LCD TV or other connected equipment.
3. Press the button on the remote to turn on the LCD TV.
4. Press the Input button on the remote to select COMPUTER.
   

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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LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |

In about 95% of the time when the TV is having a hard time turning ON or turns OFF by itself or needs to be unplug to make it work again; those are symptoms of dying or defective power supplies.
I repair these power supplies, if you need further info write to [email protected]

I have same problem (power light is on, and I have sound, but no picture ) and found that a small capacitor on back of power supply is blown. Seems to be common problem. But viewsonic doesnt stock. Part number is b-00005352 and im trying to find one too

i have same problem.
tech support couldn't work it out, so i have to send it back....
hope to get any idea.