Question about Sony KP-51HW40 51" Rear Projection Television

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Sony 51inch tv blue screen appears

I have a 4 year old tv and when I turn on my tv the picture shows after a couple minutes the screen turns blue and I can only hear sound. I read it might be a blue tube problem and sony knows about a manufacturers defective tube. How would I know if its a manufacturers defective tube. If sony doesn't change it for me, where can I go to find a blue tube for a low price.

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Re: sony 51inch tv blue screen appears

I had just adjusted the lower right adjustment on the screen focus block. 1. Remove the front speaker panel (there were 2 screws) 2. After the panel is remove, unscrew the sheet of plywood that's held together with 4 screws, this will expose the TV's innards (guns, etc) -- be careful. 3. At the bottom, there's a small box with 6 adjustable (via a philips head screwdriver) screws. Disregard the top row of 3 (they're for focus). 4. What I had to do was adjust the left most one ever so slightly with my philips screw driver. It seems the TV was over-firing blue causing everything to have a very slight blue tint as well as the lines. Once adjusted, the TV was good as new.

Posted on Sep 12, 2007

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Re: sony 51inch tv blue screen appears

The CRT's are the most common problem on those sets and if you have to replace one, plan on replacing all three otherwose the other two will follow shortly. This was a defect in the CRT's and Sony did cover them up to 4 years from date of purchase.

Posted on Apr 24, 2007

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Re: sony 51inch tv blue screen appears

Could be a blu tuibe but also i've seen many bad sony CRT Drive bds(the circuit board connected to the neck of the tube). You won't find really any place cheaper than the next if your a consumer. just try Oh, and forget about sony paying for it 4 years is way out of warranty.

Posted on Apr 23, 2007

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Screen fades to blue.

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KP-51HW40 Sony 51" Fades to blue screen

The service manual on page 8 shows how to adjust the Red/Blue/Green screen voltages. To get to the adjustment board, take the front speaker grill off (two screws at the bottom left and right) and set it aside. No need to disconnect any wires. Then remove the plywood board with 4 screws that exposes the screen/focus adjustments. The top 3 adjustments are for focus, and you need not mess with these. The bottom 3 adjustments are for Red/Blue/Green screen voltage rough adjustments. My screen showed red lines, so I had to turn the bottom right adjustment with a philips head screwdriver just slightly until the red gun retrace lines where no longer visible.

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Sony KP-51HW40

I had the same problem with mine 2 years ago (TV was 1.5 years old at that time) I had extended warranty on TV and it was fixed by Sony at no cost to me. Now yesterday I have another problem with it. All of a sudden screen went BLUE. No Sound either. It could be the CRT (That's what I read here) Out of luck this time. Will call local Repair shop (70 miles away) and see how much it will cost to fix it. Good luck.

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Blue screen

you have a bad blue picture tube sony dos not make it anymoore , so you will have to have it rebuilt.

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