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Adjust the brightness until it starts making the black in the picture slightly milks and back it off slightly
Adjust the contrast so that the whitest whites show detail, too much contrast and they disappear
Adjust colour to suit, start with it half way, look at flesh tones on a news reader as a guide and adjust sharpness so you can see detail but not so that there are false or visible edges around things
it is bit tedious to remove the case and adjust-. if you are very much famliar with opening the case and want to try adjusting it ,only then open it or else dont open as adjusting may effect reverse too- by putting up more image in the bottom to drop and making it more worse.its advisable to get it done by manual technician if very necessary.
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If there are lines on the screen [parellel lines across the screen horizontally, at about an inch or so apart], your tv needs screen adjustment. Its screen voltage is now high. It can be brought low by adjustments. There is a screen adjustment control, usually integrated with Line Output Transformer. If you know, you yourself can adjust this. It is an internal adjustment and need to open the back cover of the TV. Don't use your TV for long time without rectifying this problem. It may get picture tube damaged. The electron guns inside the picture tube neck will get red hot and its emmision will be reduced.
(1) Adjusting the brightness and seeing that video is present (just black)
(2) The TV's menu system is visible on screen even though no images are
(3) Your particular SHARP model supports picture in picture mode
Then I suspect that the problem is your TV's picture-in-picture sub-board. All external video sources & the internal tuners must pass through this board before being processed and displayed on the picture tube (even when PIP is not enabled). As far as I am aware SHARP does not provide this board as a spare part anymore, but they can be repaired at the component level if the failed component is a generally available device.
no rocket science here - my son fiddled with the cable cord attachment, until presto, the screen became sharp. Then we moved away as fast as possible, lest we shifted it and it put us back at square one.!!
At the rear of the tv there may be two controls on the right hand side marked "screen" and "focus".If the set is newer,you will have to remove the cover and look to your right.You will see a dark object with a black or red wire coming out of it's top.That is your flyback transformer.On this you will find these two controls.Adjust your focus with the one so marked.Be careful to only adjust this control while you watch your picture clear.PROMPLY put the cover back.
*The brightness control setting determines how bright your picture will be.
*The contrast control sets the gain of the video circuit. This determines the difference between dark and light scenes. Low contrast settings make the picture "hazy". High contrast settings make the picture more distinction between dark and light scenes.
*The sharpness control determine the frequency
response of the video circiut. High sharpness settings give better resolution but also shows
more noise in your picture. Lower sharpness settings smoothe out the picture removing noise but also fine detail. It needs to be set for the best all around picture.
*Picture Enhancement is pre-set adjustments which give you
different picture qualities. You just select the one you like.