This morning, I turned on the Tv and the scrren was dark. You can still see the picture, but it was like the brightness was turned right down. So I unplugged it for 2 hours so it would reset, which seemed to work. But then it started going light to dark. But when I go to HD channels, its crystal clear. When I tried the DVD player, it goes dark again. Help!
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Re: screen goes light and dark
Check the connections from the DVD player, make sure they are not loose. If the DVD player has it's own brightness, contrast or gamma settings, they may have changed, in which case reset them to default if you have that option, or just play with them until you have it sorted.
Quite possibly your DVD player may have a feature that you can enable that dims or brightens the image by the touch of a button, look out for that.
However it seems unlikely it's a problem with the TV - the only thing I would say about the TV is it may be the ports which the DVD player uses to connect to the TV.
The only way to find out if it is the TV or not is to try a different DVD player with it.
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If your TV seems to be darker than you think it should be, it is possible that the problem is with the light sensor. The light sensor will automatically adjust the picture brightness based on the ambient light that is in the room, (i.e. if the room is bright the picture will also be bright, if it is dark the picture will also be dark).
To turn this feature off go to Settings > General Setup > Light Sensor.
If your TV has already fully adjusted in brightness set up?, and there will be no good picture results?...try to adjust the "SCREEN-Screw" at the flyback slowly. If the picture still dark'?. the picture tube has need to rejuvenate.
Since its a LCD take a flashlight and have the room as dark as possible and with the light look to see if a very very faint image of the picture can be seen or not---many of these sets use a "back light" for the brightness and if that's not on.......
There are two small holes on the rear side through which you can adjust focus and screen. Use a flash light and locate the two adjustable slots inside the holes. This part carries high voltage. Do not use a metal screwdriver to adjust. Put the TV facing a mirror so you can see how it works. Do not turn more than 1/8th of a turn. The focus control makes picture sharp or fuzzy. Screen control could change brightness. While watching the picture in the mirror, slightly adjust the screen control. Do not turn too much. If it doesn't work, then call a JVC authorized repair center.
Lcd tv sets are lit by small glass florescent tubes called cold cathodes and, are powered by: ballasts called inverters... these go out just like your office florescent lighting the parts can be purchased online from electronic parts houses and, are easily replaced
Most PS2 games are dark and auto brightness controls will casue your LCD tv to brighten up automatically in response the dark video coming from PS2 games. I suggest you get into the menu settings of your TV and find a setting that will shut off the auto picture controls.
I thught I answered this one but if you disconnet the sensor it should brighten up the picture If it dosent then its part of the brightness curcuit and must be replace. As I remeber thewre are severall models that you could simply disconnect. Or there should be an auto brightness feature in the main menu picture ajustment to simply disable or shut it off. Good luck