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

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Red & green lamps shutting off leaving a blue screen

TV is on for long periods of time, that is probably related to the problem.  Main problem:  The red and green lamps shut off and leave a blue screen.

Had back cover off to see the two lamps shut off and noticed the rubber (oil?) cover on the blue lamp was distended, and hot.  Turned TV off and the next day rubber cover on the blue lamp had returned to its normal shape.


After reading other's solutions on this site, I took off front speaker cover and turned down the lower control screw (maybe 1/4 in.) for the blue lamp because I also had the light blue horizontal lines. With the front open, I could see the red and green crts were still shutting off after a few seconds.  After putting the front cover back on, surprisingly, all the lamps stayed on. 

Now the colors seemed to be wavering between normal and a predominant yellow, so I readjusted the blue control back slightly.


Can solder connections just crack by themself or from heat??  Although I did'nt see anything obvious when I had the front open,  I'm asking because even though the TV appears to be working fine right now, I don't believe that my slight adjustment activated the red and green lamps.  It seems more likely that a loose connection is seperating, and I'm concerned that even rolling the TV back into its usual spot has the potential to cause the red and green lamps to fail. 


Any insights you can provide will be very appreciated.





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Re: Red & green lamps shutting off leaving a blue screen

Could you show a picture of the distended cover you mentioned?


Were the light blue lines you were referring to, diagonal, or truly horizontal?

Posted on Oct 16, 2007

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