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

1 Answer

Trouble I have 51in. Sony kp-51hw40, i turn on the tv and the screen was green,good sound but the picture stay green. The red light is blinking 5 times. What is the problem and how can i fixit.

Posted by Edgar Laracuente on


1 Answer


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

Rookietec, I have the same type of problem with our Sony 51" KP51HW40 as well as thousands across the country. I have done a lot of research on this and have been in contact daily with Sony and my area service dealers. This is what I have found: The green, red, and blue picture tubes are filled with a material that is defective. When this material eventually gets overused (after a few thousand hours of use) the TV senses "something is wrong" and automatically shuts itself down. Sony is and was aware of this situation back in production and even changed the type of tubes they used but the new ones weren't any better. Sony established an extended, limited warranty to cover the cost of repair for this well-known problem but at this point the picture tubes are no longer in stock to provide repair. According to Federal law, manufactures are obligated to replace with equal or greater value product if they cannot provide repair on something they know was defective. My suggestion is to visit to report a consumer complaint to the Federal Trade Commission. I just did this morning and it took me about 3 minutes - very easy. Turn to Sony and ask to "Escalate your complaint" to higher levels because Call center reps are not in a position to help you. You start to get somewhere when you get a Special Event ID # and reach the Tech Rep department. I have been in contact with a few people that have been very persistent and stuck to there guns on this and they have been able to get an upgraded new TV for the price of what the repair would have been if Sony had been able to repair the set. The entire process for these people took about 4 weeks. I'm in week 2 and feel like Sony if finally being receptive. Hope this helps, feel free to contact me for any additional information at [email protected] BadSony

Posted on Oct 11, 2006


Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have no picture and the power light flashes green and then red.

I can help you to solve your Sony tv problem.
Is it Sony KP-51HW40 tv or any other model?
How many times red light start blinking after three seconds long pause?
Let me know to proceed, can you check voltages with multimeter in tv circuit board?

Nov 26, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

My KP-51HW40 clicks off after running for a period. The red power light blinks when it goes off but screen stays dark. When TV is shut off for a while it restarts and runs fine. The "On"...

KP-51HW40 shuts off due to incorrect white balance and blue arch lines is an evidence of that incorrect white balance. I hope tv standby red light would flashing 5 times then 3 seconds pause and again 5 times when tv shuts down.
This is rear projection tv that has three picture tubes (red-green-blue) inside to generate picture that projected at front screen. These three picture tubes must be drive with correct drive voltage to produce good picture of each color.
Solution for your tv problem is Screen Voltage adjustment that can be done easily if you are handy with electronics stuff repair.
Let me know your expertise level to guide you more and if you feel unconformable by tv repair then local tv repairman will help you to adjust white balance in tv.
Hope these info will help you.
Let me know if you have additional questions.

Nov 05, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Turn tv on,picture good for 4 seconds,then green curved line like a rainbow all green,then 4 green sequence flashes,picture goes out theN volume continues for 2 seconds then out front red power light then...

This is a set with bad picture tubes-not available except on rebuild basis.

Are you seeing bright green screen and then set shuts off?

Let me know so I can help--8 blinks is AKB error.


Sep 15, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony KP-53HS10 rear proj TV - picture goes on & off

If the adjustment of the screen settings does not fix your problem, its likely that one or more of the CRTs (picture tubes) is defective.

And, the CRTs for these sets are hard to find and expensive.


Jan 29, 2009 | Sony KP-51HW40 51" Rear Projection...

2 Answers

Green screen and shut down

TV screen flashes with Red lights for few times. sometime it shut down TV or red color is lost showing pictures without Red looks terrible. Any solution

Sep 17, 2008 | Sony KP-51HW40 51" Rear Projection...

4 Answers

Green flashes then tv turns off

or a new lamp. you could first replace the lamp.
the screen might work fine for a couple of seconds, but then it fades away or deteriorates. This means the lamp is going bad.

Aug 23, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony KP-51HW40 51in

It sounds like your red tube is going out. Fairly expensive piece but easily replaced. They run anywhere from $250-$350.

Jul 23, 2008 | Sony KP-51HW40 51" Rear Projection...

3 Answers

Sony KP-51HW40 No Picture, only sound

to thus problem its very simple .! try to resolder at the back of the picture tube board.

Nov 26, 2006 | Sony KP-53V75 53" Rear Projection...

Not finding what you are looking for?
Sony KP-51HW40 51" Rear Projection Television Logo


Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76584 Answers

Nasir Muhammad
Nasir Muhammad

Level 2 Expert

230 Answers


Level 3 Expert

513 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides