Ti ripeto che sono cose che si trovano sul web, io non le ho provate, quindi mi limito a un semplice copia incolla, non mi prendo responsabilità.
Ho trovato questo video:
http://www.youtube.com/watch?v=7V-LiOYLYww
e ho trovato un utente che sostiene che gli schermi siano riparabili così: ( anche se la quasi totalità dei pareri che ho trovato sul web, sostengono, che lo schermo vada sostituito):
Almost all of the screen faults described in this thread are REPAIRABLE. Sony and almost all tv repair shops will tell you the screen will need to be replaced. The screen should be replaced, but since Sony seem reluctant to acknowledge that some of their sourced screens are junk and break down after a year or twos use, you have two choices. Repair it, or chuck it & buy new. The 1st option will cost you nothing more than 30-45 minutes of your time.
The fault on all of these models (V, W & X series, e.g. KDL40X****, KDL46X****, KDL40W4***, KDL46W4*** etc) is with sleeves that connect the screen to screen boards. When facing the tv, the fault is almost always with the sleeve on the extreme left, or extreme right. Basically these sleeves are very thin plastic sheets that contain minute circuitry that connects the screen to the matrix boards. With the screens being subjected to significant heat over the months/years, the bond between the sleeve and the screen breaks down, which results in a bad contact.
The fix is fairly simple. You need to remove the frame that surrounds the screen (usually an aluminium frame held in place with some small but longish screws.) When the frame is removed, you will see the long retangular boards at the top of the tv, two of them, one on the left side of the screen, one on the right. You will also see the sleeves that connect these boards to the screen.
With the tv on and showing a picture (which should be distorted, dark, shadowed, with horizontal lines etc), lightly press the sleeve on the extreme left of the screen. Press the sleeve towards the frame, or downwards. You will note the picture miraculously works!!!
So the cure? You need to put some padding between the frame and the sleeve so that when the frame is screwed back into position, the padding presses down on the sleeve and corrects the issue with the bad contact. Job done, it is that simple! The hardest part is taking the tv apart, but that should only take 20 minutes. 10 minutes to use some padding, 10 minutes to put the tv back together again.
To clarify, the fault is almost always with the 1st or last sleeve, i.e. extreme left or right. It is usually the left sleeve that creates the problem.
Try this, it works. Alternatively, stick your tv on ebay so I can buy it, fix it and make some pocket money.
