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

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Blue screen I have a KP-51HW40 Sony that goes blue when I turn it on after a minute or so. It has sound and picture for just a few minutes and then it turns blue. Would you please let me know what I should do to troubleshoot the problem. Thanks, Tony

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This is easy to fix, pull off the front grill and turn the bottom left trim pot anti clockwise until the picture comes back. I am asuming the picture there and then it fades to blue. There is a step by step instruction on how to get the whole thing apart http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Posted on Sep 15, 2008

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I have a sony kp-51hw40, it started to have blue and red lines accross the screen. now the picture turns blue then turns off. is my red and blue gun wore out?


find someone that knows about TVs to take off the front access cover and adjust the screen controls .DON'T TOUCH THE FOCUS KNOBS.Just the screen control knobs.Usually they can work a few more years with adjustements . But if it can't be adjusted to work then the guns would have to be repaced.Many many many many of your model were affected by a little screw up sony made with their CRTs.

Oct 03, 2009 | Sony KP-51HW40 51" Rear Projection...

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TV turned off itself


Can you still turn it on?
If so, does it stay on with sound?

If the sound is ok and the picture is blue (even when changing channels, inputs, etc.) the lamp may have gone out.

Can you see the TV menu when you press the menu button on the remote or TV?

Jan 07, 2009 | Sony KP-51HW40 51" Rear Projection...

3 Answers

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.

Aug 26, 2008 | Sony KP-51HW40 51" Rear Projection...

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KP-51HW40


sounds like the tuner may be going out on the set.

Aug 10, 2008 | Sony KP-51HW40 51" Rear Projection...

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Sony KP-51HW40 51 in. Rear Projection turns blue


Hello......
First reduse the G2 voltage for the blue c.r.t,and watch if the unit works for longer period (offcource blue colour will be not present).After reducing G2 voltage to blue c.r.t still behaves the same than c.r.t is faulty and you have to replace.
Pls count the red led blinking when it goes off,incase it goes to std by mode.
Gopali

Dec 14, 2007 | Sony KP-51HW40 51" Rear Projection...

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Sony KP-51HW40 fades to blue screen


you need change the ic in the soket blue [video out]

Aug 15, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony Kp-51hw40


Sounds like a bad solder connection in the sweep power supply. Not a repair for the novice I'm afraid. If you get it fixed before the set goes out completely, it should not be that expensive of a repair. Good Luck

Jun 03, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

KP-51HW40


the unit needs either a screen control or a new blue tube.If it needs a tube,sony is aware of many units with manufacture defective tubes

Mar 05, 2007 | Sony KP-51HW40 51" Rear Projection...

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