Tip & How-To about Televison & Video
One of the most common failures with LCD televisions is sound but no picture. The frist thought around this failure is that the television has failed and the screen has went bad, in some sense it has, but you can determine if the screen is good but the lamps are just not lighting up.
First turn on the television after the television is on darken the room as much as you can, when you hear the sound from the tv take a flash light and using the vent holes in back of the unit shine the flashlight thru the vent holes toward the front of the screen. If the video circuits are funtioning ok then you should be able to see a picture on the screen.
If a picutre is seen this indicates that the televisions video circuit is functioning ok but the backlights or lamps are not functioning. Of course this does not apply to plasma televisions because the technology matrix of this type of television is very different.
At this point you can focus on finding out why the lamps are not lighting, most probable cause is faulty or missing inverter board voltages or just a bad inverter itself. The inverter board is responsible for lighting the lamps and keeping then on. Check the power supply for faulty capacitors and also check the small transformers on the inverter board for faulty connections.
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