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It is rear projection TV that use 3 picture tubes of red-green-blue to show color picture on tv front screen. Do you see standby red light blinking when TV shuts off after showing blue image for a while? If red standby light is blinking, please count it how many times it blinks, there would be 3 seconds pause between blinks so count pause to pause and post it here to find out possible solution. Thanks.
You have to
check if you can see the image on the screen or not after it went blank (Power on both CPU and monitor) by shining a flashlight into the
screen, not directly but find the best angle to the screen and take a look very
closely. If you can see the icons or any image, there will be a minor problem.
Like mine, I can see window image using flashlight and check lamps inside. Some
of them were broken and it is very easy to replace. If you cannot see anything on
the screen, there'll be some problems with inverter board. If you have
soldering tool and want to fix it by yourself, check the caps first. It may
cause this problem. Some caps might show leaking or burn spot on the board
because of too high temp. If you don't have soldering tool, you better go get a
technician to do so. Thank you
my Samsung A800 also lost its inner display recently. When I open the phone, the inner display lights up but fails to show any image. Outer display is mostly OK, once it had trouble to "lock" the image and after opening and closing the phone a few times the outer display showed the image with light and dark bits inverted. Switching phone off and on restores the inner display most of the time, but the image only lasts until I close the phone.