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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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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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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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 partstore.com Oh, and forget about sony paying for it 4 years is way out of warranty.

Posted on Apr 23, 2007

  • josh vannoy Apr 25, 2007

    TVTEK is right, I forgot about the lengthend warranty period on those sets, however in my experience anyway, that problem was just a subtle flicker in color and usually would not go entirely blue, also the Sony service bullitin had you change I believe 3 resistors, 2 of which were tiny surface mounts. I do remember doing the big job with all three tubes once or twice on tvs that went really dominatlly one color just to find out that the problem was the drive. None the less, you should let a Sony service center do the warranty job with the tubes and if they find out they need to repair the drive then at least you got three new tubes.

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