The tv when plugged in and powered on shows all three lamps lit, the red,blue, and green. Once the unit warms up the green and red fade out and shut off leaving a blue picture screen. Is there any way the red and green lamps could be faulty causing this or does it sound like a power supply going bad once the unit warms up?
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Re: loss of colors
IF you would like help diagnosing your set. Go to the enclosed link. They have the service manual for your set and offer unlimited chat support for only 10.99. Just click on your sets manufacturer and you will see your model. Then click on the contact us link and provide your email address and they will email your manual and instructions on how to obtain your support. I am one of their techs http://servicemanuals.vstore.ca/
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are 3 color cathode in your TV red,green,blue cathode.The red and blue cathode
might not working in your set that is why you have a green screen. Open
the back cover of your TV you can immediately see the 3 cathode lamp at
the back. Clean the lamp first using a clean clothe. Power up you tv and see whether the 3 lamps are lit. If lamps do not light up,check the circuit board where this lamp is
connected re-solder all the components in this lamp. There is also an
individual screen adjustment for the lamps it is located at the front
panel and labeled RGB screen...try this first and let me know how it
Ballast failure is more that likley the problem. Is the lamp light blinking,...once every 5 seconds? Discontinued part and can only be purchased used or rebuilt. Rebuilt units are available, check Ebay. Have a service type person confirm problem before throwing good money after bad!
The POWER/STANDBY (red) indicator flashes three times If your power/standby indicator is flashing in a pattern of three flashes, this may indicates that the lamp cover is not attached securely. Follow the directions in the Operating Manual under changing your lamp that related to closing and securing the Lamp Cover. Ensure that the Lamp Cover Door is securely fastened by tightening each screw.
The POWER/STANDBY (red) indicator flashes continously If your power/standby indicator is flashing continuously, and the lamp cover has been secured, your TV may be in need of service.
The POWER/STANDBY indicator is lit up green (not flashing) A sustained green light indicates your TV is on.
The POWER/STANDBY indicator is lit up red (not flashing) A sustained red light from your power/standby indicator simply indicates that your TV is in standby mode. This shows you that your TV is ready to be turned on with the remote.
Is it the power light and not the lamp light? If the lamp light is flashing then replace the lamp.
Are they thin, white lines running east to west? If so, they are called retrace lines and indicate that the screen settings for the picture tubes is set too high or there may be a mal-function of the CRT driver circuitry. Try adjusting the screen controls which are located behind the front grill of the TV behind an access panel. Once you remove the grill and access panel, you'll see a small control assembly the has two sets of controls. Three for adjusting the red, green, and blue focus, the other, the red, blue, and green screen controls. To adjust correctly, put the TV on an unused input(dark, blank picture) and adjust until there are no visable retrace lines or color in the image.
I got this Sony KP-57WS500 57 in TV for FREE from a guy posting it on craigslist because he saw "BLUE SWIRL LINES" also knows as "Retrace Line" on the screen and he went to several repair people and got high repair costs so he was giving it away for free, but i found a guide that tells you how to adjust the tv to make the blue or green or red lines go away, aparantly the line show up because the voltage on the color ray gun tubes that get out of adjustment. Here is the Link to the REPAIR GUIDE. http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html