Question about Philips 55PP9401 55" Rear Projection Television

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Inside the cabinet projected on the screen?

I have a Philips 55PP9401. It has a beautiful picture....While on, it looks like a cob web with some dust on it is being projected onto the screen.
Is this possible and if so, can it be remedied easily?

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Its a spideweb behind the screen. i had the same problem, take the back off (unpluged) and spray them out whith a can of compressed air. i thought mine was screen damage for a long time till i saw the spider walking on the screen from inside.

Posted on Dec 31, 2007

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Well . there are 4 things that can cause this..
1= the outer screens could be dirty.clean with screen protector cleaner.Spray on cloth and not on outer screens.
2= outside lenses of picture tubes could be dirty.Unit can be opened .Outside lenses can be cleaned with a lens cloth .Do not use paper towels or cotton as this my scratch surfaces of lenses.
3= inside of picture tubes could be dirty.This should be done by a repair shop only(dirty coolant inside tubes)

Posted on Dec 28, 2007


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I have successfully used a feather duster taped to a vacuum cleaner extension tube with duct tape. Remove the back panel of your projection television, then remove the the rectangular panel near the top over the chassis where the cabinet exposes the inside screen area. You will see the red, green, and blue CRT lenses. Insert the feather duster through this rectangular opening and sweep your cob webs away from the screen. Works for me every time.


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IC's ....STK392-110 sub to upgrade STK394-160E....I use
Hitachi part # CZ, look for discolored resistor
near IC's.....replace with exact value......last = activate

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