Question about Sony KP-57WS500 57" Rear Projection Television

2 Answers

Replacing the blue crt - Help!

The blue crt on my kp-57ws500 is shorting, so I was told by a tech. He said it would cost me around $500 to fix it!

Problem: the tv turns on for a few secs and then shuts off. Once the blue crt connection was pulled out the tv stayed on, and this is how he verified it was the blue crt. He tried tapping it gently but this did nothing.

Are there any step by step instructions to change the crt's? How much does a blue crt cost online?

Posted by on

  • atldesi Apr 14, 2008

    Is there a site specifically for the sony model tv I have? This site talks more about projector crt's :(


  • atldesi Apr 14, 2008

    Thanks man...appreciate the reply I wanted to try a self fix...def not worth spending $500-600 on it after 5 years..


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 472 Answers

I know this isn't going to be what you want to hear (and I see the rating left for Jamie), but the tubes are extremely similar. The replacement of the tube is not easy in projection TV's.
You have special cooloing liquid that sits between the tube and the projection lens that sits on top. This is expensive stuff to buy, and not very easy to work with when refilling.
The tube is going to cost a packet due to the fact its the blue tube. Even in CRT projectors, the blue tube always goes way before the red or green. The manufactures know this, and will charge accordingly.
If you decide to do this then you have all that plus once it's all installed, you then have to have the correct service remote to do the calibration correctly.
I don't want to say it, and I know you don't want to hear it, but these TV's after they go in the current priced electronics market are not considered ecconomical to repair unless you dearly love the set.
The other bad news is now the blue has gone, the red and green will probably go in the next 12-18 months anyway.

I am not trying to talk you out of the repair, just trying to let you know what you are in for.

Posted on Apr 14, 2008

  • Peter Thompson
    Peter Thompson Apr 14, 2008

    On the upside, at least the repair bill is several thousand 2 months after the warranty runs out on your new plasma =)

    There is always a bright side.

    Ok, if you are SURE you want to do it, then get the part number from your current tube. There are of 3 different part numbers for red, green and blue that will be almost the same.

    Do an online search and see what turns up. The reason you will be better to search is just because it came out of the same "company" dosn't mean it was made in the same factory, at the same time etc etc, so you will end up with different tubes in different sets.

    The fluid is an antifungal coolant that can be hard to find and you may need to order it in.

    This stuff gets messy quickly. Put some old rags inside the set to cover all the boards. Take the projection lens off, drain the fluid out.

    Next remove the tube (make sure you have removed all the wires from the neck ect.) There will be a few botls to remove, but they will be obvious. Gently lift out the old tube.

    Do not throw it away yet. You may need to remove the brackets to remount onto the replacement tube.

    Put it all back together, and then the fluid replacement will vary depending on the method in your set. You will see how it is done clearly, some have a filler hole, others you have to fill up the hole, then carefully refit the projection lens. Make sure their are no air bubbles in there.

    Bolt it down tight, but not over tight.

    Reconnect all the HV cables etc to the new tube.

    Then your into the calibration, pending all went well and the fluid didn't leak onto the circuit boards.

    Sound like fun.. =)


  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,307 Answers

Go to this site to get more info on how to work with CRTs.
Good Luck.

Posted on Apr 14, 2008

  • Jaime Hernandez Apr 14, 2008

    Well, sorry that it did not help you much.

    I though you understand more about the projectors CRTs. Your TV is using them.

    If you need more instructions on how to change the CRTs, get the service manual.


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Screen turns blue after 5 minutes of operation

Hello, the blue color if excessive in intensity is due to a probable HV block, intermittent blue amp. or an intermittent K to A internal short in the blue CRT. either one of these circuits will require diagnostics done by an electronics tech. Repair cost of either one of this problem will run over 390 dlls, a lot more if the problem turns out to be a defective CRT. Hope this helped.

Jun 21, 2010 | Sony KP-57WS500 57" Rear Projection...

2 Answers

The tv turns on - the screen is red - sound is working

sounds similar to mine (blue) I am told its a faulty crt blue tube.

Jan 05, 2010 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Sony kp-57ws500 flashes blue, green, red then turns off

Re-insering the flyback wire is usually very easy. Push in and give a slght turn and check to see if grabbed. It sounds as if there is more issues than flyback wire. TV should turn on without one crt connected

Dec 14, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

The screen on my Sony wide projection tv is turning blue after a few minutes. can you help? the model # is KP-57WS500

This is a typical bad CRT. The blue CRT part number is 8-733-647-25 but they are no longer available. It is not uncommon for this eventually to happen to the other CRT's as well. The only fix is to have a technician pull the defective CRT and have it sent to a company called VDC for rebuilding.

Nov 11, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Blue screen and blue lines

The blue CRT has shorted, you may be able to get a little more use out of it by truning down the blue CRT slightly, but the CRT will need to be replaced eventually

Aug 09, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Rear Projection Sony KP-57WS600

sounds like the blue crt is shorted and thats causing the red voltage to increase causing retrace lines then shutting your set down. You can get new CRTs at the following link with free shipping but they are pricey.

Jun 16, 2008 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Sony kp-57ws500

you need a new green CRT, sony has had some problems with the green and blue crts developing shorts . Let me know if you need further assistance.

May 09, 2008 | Sony KP-57WS500 57" Rear Projection...

2 Answers


Do either the red or the green crts come up at all?? If not the heaters in the blue crt could be bad - loading down the HV and the shutdown circuit turns the set off.. Only repair for that is to replace the blue crt, but I would have it tested first.. In the shop here we use a B&K467 to test for shorts and emission leaks but that's old school.. B&K has since come out with far superior crt tester/rejuvenators..

Dec 09, 2007 | Sony KP-57WS500 57" Rear Projection...

2 Answers

How to change CRT in Sony KP-57WS500

CRT is expensive!!! Try to shuffle the electronic parts driving the CRT tubes first, it has three sets of parts, all are the same in each color: red, green, blue. Sometimes cleaning the leads or metal parts of the circuits, specially the green region, will gonna solve the problem. Do it first, it wont gonna cost you a dime, just time. [:0)

Nov 12, 2007 | Sony KP-57WS500 57" Rear Projection...

Not finding what you are looking for?
Sony KP-57WS500 57" Rear Projection Television Logo

Related Topics:

574 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts


Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

73118 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1667 Answers

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

Answer questions

Manuals & User Guides