SOURCE: Screen gets darker.
4 Tmes blinks shows error in Power supply or Vertical defelction area. If you konw how to repair it, check these sections.
SOURCE: screen fades to blue after 10 mins of viewing. Sony kp-57hw40
This link has the instructions on how to fix this problem and other similar problems. You have nothing to lose, so I recommend that you try it.
http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html
This works with the two other colors, blue and green also. Not all models of Sony Projection TVs have the red, green, and blue pots in the same order as the picture that is listed on this link, so you may want to google search for your model's service manual. The service manual can also help you be able to remove the cover for your particular model of TV. I was able to find the service manual for my model, and sure enough, the order of the pots are reversed on mine, so I would have been adjusting the wrong color. Read all of the comments on this link too, because you can find other helpful tips and may even find someone with the same model of TV as you that gives more specific instructions for your model.
You may also find your model's service manual here:
http://esupport.sony.com/US/perl/index.pl
I hope this helps you!
Fare well. :)
Iconoclast
P.S. you can also clean the mirrors and dry dust while you have it open.
SOURCE: I have a faded picture on my Magnovox 55 inch
You can get the service manual at
www.servicemanuals.vstore.ca
If the color are dim you most likely need the phillips coolant kit also available there which contains the CD with instructions.
The fact that the hair dryer allowed the set to come on tells me you have capacitors in the power supply that are leaky. I'd on the board as C1,C2 etc. The value of the part will be on plastic like caseing example 1000uf 25v. Look for a slightly domed top. That will be the bad ones. When replacing these make sure you put them in the same way as the ones that were in the set. They have a positive and negative lead. If you put it in reversed the new part will explode.
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