Question about Philips 9P6040C 60" Rear Projection Television

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Low or no luminance

Picture is very dark, all color signals are there, pix and sound are fine, tried adjusting brightness, some improvement but still not good pix, i hear a cap whistling faintly but cannot locate, im working without a schematic, so tracing luminance signal is a bit hairy, just wondering if anyone has ran across this problem and can offer a quick fix.

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Re: low or no luminance

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, dark, etc. You may even see halos around images. 

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from that includes replacement coolant, photos. instructions, etc.

Posted on Jan 26, 2009

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