Question about Panasonic PT-51HX41 51" Rear Projection Television

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Do i have a problem with my lense housing

Is their suppose to be like a oily clear fluid inside the housing under the last lense if so with type of fluid is it?

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YES there is! Its called coolant Fluid/ some call it Projection TV Fluid cost 8oz 7.99 and 16oz bottle 12.99 per bottle plus shiping You can order it at or call 1-800-223-3205

Posted on Dec 18, 2008

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I have a 40" hdtv that has a blue hue in the middle, kinda looks like an "UNDER ARMOR" design. What is this from and can i fix it.

Sounds like the coolant is old. Projection sets have 3 tv tunes in them red, green, blue. They are coupled to a magnifying lense via a coupler that contains an antifreeze type fluid that helps dissipate the heat. Over time that fluid gets old and breaks down and often results in dark spots on the screen. The stuff is toxic and a pain to replace. Best to call a service technician. Before doing that I would carefully access the tunes and spray window cleaner on a lint free rag or towel and wipe off the lenses...just to be sure there isn't anything on them..especially if you or a previous owner smoke. Make sure to allow plenty if time for it to dry and never spray the cleaner onto the lenses.

Aug 18, 2016 | Televison & Video

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I have a sonny rear proction tv its very foggy the piture

Three things you need to do:

1) Take the back cover off and clean the:
a) Mirror with glass cleaner
b) The dust that collected on top of the CRT lenses

2) With tv unplugged, use a flashlight and look down the lense of the blue, green CRTs. There is fluid in there. If the fluid is not clear, then it needs to be replaced and the tv re-aligned. Not recommended for anyone without experience.

Cloudy fluid is typically indicated by a foggy picture. THis is assuming you have a standard 3 CRT rear projection TV.

Mar 08, 2011 | Sony Televison & Video

1 Answer

I have a PTV916 Model # 60P8341A. I cleaned the lenses and the mirror inside the TV however, I can see alot of dust inside the actual lens. Is it possible to clean the inside of the lenses?

ll projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

CRT Fluid is Cloudy

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, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change



You can see some more examples and find a fix using this link on Fixya

Jan 13, 2011 | Philips 50P8341 50" Rear Projection...

2 Answers

Does it take some type of gel under the lights, the colors are a little blurry

i also have this tv. i removed backcleaned mirrior, back of screen and lenses VERY GOOD. Then turned on tv go to convergence, sepaerate cross hairs then adjust focus on lenses. Then lenses rotate maybe about a 1/3 turn total by hand. Grab ring that houses lenses and turn until cross hairs are as clear as possible. This can be done with out help by watching inside of screen. red and green are adjustable, the blue is adjustablealso but i couldnt find blue cross hairs, maybe by covering red and green lenses the blue will show on screen. anyway when done and cross hairs are clear,lenses, mirror and screen are clean, you can adjust covergence and get a very clear screencleaning will also brighten pic. Pete

Mar 27, 2010 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Lost picture and sound after moving television

It sounds like CRT Fluid from probably the Blue CRT has leaked over the Boards in the set. The worst of is the Fluid is a Glycol base
and it is conductive. Plus it also soaks into the boards and it cannot be removed once it soaks in. Unfortunately the news does not get any better. The cost of the CRT and the replacement of the board/'s would probably more than replacing the TV.
Sorry about the bad new,

Jul 07, 2009 | Hitachi 46F500 46" Rear Projection...

1 Answer

Foggy picture

That is your coolant projection fluid make sure you clean up any that may have went on chassis ect.....refill fluid in lense make sure it does not leak and try again, tube should be same as before, when chaning fluid in lenses always turn set on look into lenses if clear it is ok if dirty looking then change fluid.

Dec 24, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Blue aura at bottom of screen

Check 2 things.

First, make sure the lenses, mirrors, and back of screen are spotless. Second, look into the CRT's when the set is running. There is a real good chance cooling fluid leaked out or got cloudy. It's supposed to be a clear oily fluid (a combo of glycerine, water, sometimes methyl alcohol and preservatives) and will be around the tube and chassis if leaking. Rebuilding the assembly is possible (Magnavox had the same problem, as they were a Hitachi chassis), but the CRT is usually damaged. If I have to rebuild them, all 3 are done in one shot - new fluid, seals, filler spout.

Besides that, the tubes are cheap and lose their sharpness with age (gets gassy). Had real problems with that and the only correct solution is to replace all 3 tubes. You could cheap out with one tube, but setting the color balance (grey scale) is often difficult if not impossible.

Good luck,

Nov 09, 2008 | Hitachi 60V500 60" Rear Projection...

1 Answer

Philips magnavox 9P6040C104

i just found out why, turn on ur tv and remove back look directly into 3 lenses, if the picture is not nice and clear or looks snowy in all 3 u will not get good color or brightness. I removed my blue tube assembly and took it apart WHILE OUT OF TV. there is cooling fluid between lense and tube, this fluid over time will build a film on the face of the tube and get thick enough to block the tube from projecting picture. (MARK EDGES IT GOES BACK TO GETHERE THE SAME WAY IT CAME APART).Find some new fluid then carefully dissasemble and clean interior of lense, housing and tube thouroughly. Reassemble and fill with new fluid. Do not use old fluid it will be cloudy and snow globe effect. Only do 1 tube at a time this will allow u to realign cross manually as close as possible before u perform convergence. Leave the green for last that is the center and the red and blue are moved to match green. Also be sure to clean mirror and back of screen. Pete

Aug 31, 2008 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Philips 55p8342 chassis ptv916

To get a new remote call a local TV service company or you can order directly from the manufacture. The cloudiness of your colors are caused by possibility of two things or both: 1) The mirror and lenses inside your TV need cleaning (use window cleaner & soft cloth) spray liquid onto cloth, 2) The fluid in picture tubes need to replaced. To replace fluid (ethylene glycol) take tubes out of unit, drain fluid, clean fluid chamber, add new fluid. How you can tell if fluid is cloudy? Take off screen assembly look into each light (red, green, blue) the picture should be clear. The red tube, light, is normally okay, so use as referance.

Feb 16, 2008 | Philips 50P8341 50" Rear Projection...

1 Answer

Picture tube fluid

Magnavox are good at fluid breaking down especially blue and sometimes red. Yes you would have to be very carefull not to waste on boards, because of set CRT's are tilt this mean when you open it will start to leak. The best bet if you are willing to try yourself is to prop up set somehow to make crt's level and when you take lense off you can look underneath and open the bottom lense cover up and expose the old crt fluid and then you will need some type of suction pump to suck out the old fluid. Once you have old fluid out then you can clean inside crt and make sure you clean good. Then replace with new fluid and go in reverse and clean all that touches crt. Hope this helps!

Sep 14, 2007 | Philips Magnavox 51MP392H Rear Projection...

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