Black screen, small portion of top of picture in view at bottom of screen
I purchased a used Sony KP-53HS10, rear projection TV from a friend. It's about six years old and worked fine for three weeks, after I moved it the hour drive to my house. Suddenly we turned it on one day and the only viewable portion of the picture was the top-fifth of the picture, seen at the very bottom of the screen, with the red, blue and green lines surrounding the top of this "picture". The rest of the screen is black. One day the entire picture appeared for a few minutes and then the above situation returned again. Since then (a week) there has been no change. "Flash focus" does not help and the viewable portion of the picture does not include the on-screen menu, so I can't see what I'm doing with that and have resisted "flying blind", so far. Sound is fine and the problem exists when using DVDs and VCR, so it's not a signal problem. It is connected through a cable box.
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Re: Black screen, small portion of top of picture in view...
Your tv has a vertical problem take it to a tech to have them look at it probably on transporting the set to your house it bump around.a look on lose solder could be the problem this could be verified by a tech.good luck.you need the repairman.
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It is most likely the convergence board. Rear projection TVs use three lights to display the image. The image is aligned via the convergence circuit. After many many hours of use the capacitors and resistors on the board lose their tolerances. It is very expensive to repair if you take into account the price for a new TV and the quality of the image you will be getting if you do have it repaired.
Remove front bottom panel behind it is a small black control box top controls are focus controls for R/G/B and Bottom 3 controls are your screen drives adjust one at a time turn off G/B adjust red first,then Do Green and Blue fter adjusting focu to each tube leave them set then adjust screen drive turn color off adjust RGB for a Black and white picture get as close as you can then turn color back If after doing this you still have blurry looking picture look down into Tubes you should be able to see picture clearly in each one if you cannot see picture then projection Fluid need to be changed out. Call Mats 1-800-628-1118.
Another point; HD Ready does not mean that it is HD compatible without the addition of an optional part. The title only implies that it can be adapted to HD reception. If you did not purchase it with the set, check your user guide to see what you need to make it whole. You may have to seek this add-on on eBay since it is not guaranteed that Sony will still offer it.
You might want to check this:
“Technical Details·53-inch HD-ready rear-projection TV (doesn't include HD receiver); 48 x 57.5 x 25 inches (W x H x D)”
the problem with your projection TV is in the so called bad soldering in the vertical deflection stage. Please contact a pro in order fot fix the error.
If you need more assistance please advice.