Question about Sony KP-57HW40 57" Rear Projection Television

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Overpoewering red my set came from my mothers house when she passed last fall. I never plugged it in until now. when I turn on the set everything is fine for about 8 seconds. then the red just starts to look like a super nova and then everything turns red. I can still see the picture but i cannot see any other color because the red is dominating everything. I can turn the set off and turn it back on and then the same thing happens all over again. the longer the set is off the longer it takes to happen again. sometimes it can take up to 5 minutes to mess-up. I took the back off and cleaned the lenses then i took a can of compressed air and blew out all of the dust nothing improved can you help me straighten out this problem

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Re: Overpoewering red

Every person I know who purchased this very expensive unit has had this problem early in the life of the TV. Sony is no help. Sony will suggest you take it to a repair facility. Sony from years ago is not the Sony of today. It was expensive to purchase and it will gouge you with repairs. Your choice. I eventually discarded my set and purchased a JVC. These rear projection TV's are garbage and Sony knows it and they dont care. Seems like the last for only a few years and then major problems occur. My solution replace it!

Posted on Aug 06, 2007

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When I first turn on the Toshiba projection tv the color has a strong red hue to it which clears up gradually

I would suggest when turning set on cold---turn color all the way off and examine screen as set warms up---if red to some degree but gradually becomes black and white the issue is either a "touchy" red screen control on the screen/focus block or a problem on the circuit board plugged to the bottom of the red tube.

I guess the real question is how long until it is normal?

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check the projectors lamp.look like to need replace

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I had the same problem in blue. I took the right front speaker cover off (pops off) and the access panel on the right side 2 - 4 screws. In the upper right corner is a black plastic box with 2 rows of 3 adjustment screws. All I did was turn one of the "screen" screws (not the "focus" screws). Hope this helps. May only be a temporary fix, but good luck...

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Het Big AOT-

Sounds like the screen drivers for the blue and green projection CRTs sre possibly going south, or it could possibly be the CRTs(picture tubes) themselves going bad, although it would be highly unlikely for two tubes to go south at the same time. My money would be on the control circuits (screen drivers).

The easiest way to troubleshoot this problem would be to obtain a can of circuit cooler from an electronics supply house and determine the area on the motherboard where the screen drivers reside; then turn on the set and let it heat up until the problem occurs, and then carefully spray (one at a time) the components in the screen drivers area. When you hit the faulty component (probably a chip), the problem should clear --- until that part heats up to failure point again.

Determine the part #, obtain a replacement part, replace it and hopefuly the problem will be solved.

The last time I encountered a similar problem in the real world, it turned out to be a cracked circuit board, and all of the intermittently broken circuit lands had to be bridged by resoldering over the cracked area... a tedious and time consuming process.

If the set is still covered under warranty, let Sony fix it... any attempts by you could void the warranty!

Hope this helps and good luck! Keep us posted as to your results...


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The resistor near the Convergence IC is most likely the problem go to the link that I am posting and enter the resitor location such as RZ129 or whatever it is and they will tell you the rating of the resistor that youre needing.Include your model number

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Your problem most likely is on the signal board is my guess. If your not a technician it would be in your best interest to have him check L2C60 on the signal board.

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Repeated convergence problem or something new?

call the shop and see what the warranty repair on the last repair is,the convergence ic must have shorted again and now the set went into shut down to protect itself.

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