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Panasonic PT51hx40b rear projection tv has a greenish shadow.

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6 Suggested Answers

  • 1 Answer

SOURCE: Picture shadow on rear projection Sony big screen TV

OUR TOSHIBA HAS A DOUBLE VISION/BLURRIE PICTURE. THIS PROBLEM IS ALWAYS THERE. SOMETIMES THE PICTURE IS GREAT, BUT MOST OF THE TIME ITS BLURRIE/DOUBLE. LOOKS AS IF IT ALWAYS ON 3D!! ANY SUGGESTIONS? WE WOULD REALLY APPRECIATE ANY HELP WE CAN GET FROM ANYONE. THANK YOU!

Posted on Aug 11, 2007

  • 19 Answers

SOURCE: cleaning the INSIDE of a rear projection tv - Panasonic PT-51G35

its better to see any experts near you,its risk your tv.

Posted on Oct 30, 2007

C-Dog
  • 84 Answers

SOURCE: Panasonic PT-51HX41 rear projection tv showing shadow/double images.

Unplug the TV from the ac wall outlet for about 4 minutes then plug it back in and turn it on. If it still has a double image then tell me if it's affecting the menu screen from the TV (not the cable menu). And is the double image in red and blue?

C-Dog

Posted on Feb 18, 2008

doin12volt
  • 233 Answers

SOURCE: Blue and yellow shadows on my Hitachi rear projection TV

The color has gone crazy on you because your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years. 
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps!

Posted on Dec 21, 2008

eagle338
  • 4889 Answers

SOURCE: LG rear projection tv just started having a blue

I am afraid you have the inevitable convergence problem. The 2 STK sonvergence ICs have gone bad. They are relatively inexpensive but the replacement procedure is pretty tough since you need to replace not only the ICs but also the nearby faulty resistors, capacitors etc., which have caused the failure of the convergence ICs in the first place. Please let me know if you have prior experience in fixing electronic stuff so that I can help you with this repair. Otherwise I can guide you to the nearest tv repair service in your area if you can get me the zipcode.

Sai.

Posted on Dec 22, 2009

Slinteriors
  • 8617 Answers

SOURCE: 46'' philips rear projection tv, red shadow

Thats caused by failed convergence ICs. You can get the DPTV305-DPTV345 convergence repair kit from www.tvrepairworld.com which also applies to your model. The kit contains the parts and the CD with instructions.

Posted on Jan 02, 2010

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PT51HX40B seeing shadow


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. The power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


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69189a5.pngSOLUTION #1

What you will need to do is convergence. You can get a repair kit from TvRepairKits.com . It includes replacement parts,step by step instructions, support, etc.

Common Problem #2) 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.

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TV set after fluid change

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69189a5.pngSOLUTION

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from TvRepairKits.com . It includes replacement coolant,step by step instructions, support, etc.

Feb 12, 2012 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

I have a sony kp-51ws510 projection tv, i replaced the convergence ic's and a pico fuse and then reset the convergence. The tv looks good except for a green shadow on lettering, also on the convergence...


Did you check the two pico fuses on the G board? Usually at least one will blow when the original ICs failed. I am attaching a pic that shows the 2 pico fuses on the G board.

Jul 08, 2011 | Sony KP-51WS510 51" Rear Projection...

1 Answer

Picture has shadows and blue is a dominant color.


Hello, your Panasonic rear projection TV might be due for some color convergence repair, there are some power amplifiers that overheat and begin loosing the color correction control.

Dec 11, 2010 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Our Panasonic Rear Projection 65' TV all of a sudden started having color problems. The color seems to be greenish with a line going through it. Any help would be greatly appreciated,


Is this a rear projection DLP LCD TV ? If you have a light engine in it , it sounds like it is going. I have a 60 inch Zenith that had a Blue Haze that kept growing and growing, tuned out to be the light engine was failing which after all was said and done it was a $3000 repair. Lucky I had it done under warranty.

Sep 17, 2009 | Panasonic Projection Televisions

1 Answer

Panasonic Rear Projection Screen TV


you need new convergence chips, there are 2, part number stk 392-110, also you must check for burnt resistors, if you don't have very good soldering skills at least, you will need a tv repairman.

Sep 15, 2009 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

Panasonic PT-53TW53; Red shadows appear and then the t.v. shuts down.


The convergence output IC's have failed. Only fix is to replace them. These are large amplifier IC's bolted to heatsinks and have a high failure rate in all projection sets.

Jun 03, 2009 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Green Color Tint


I had a similar problem with my tv. Sometimes it depends where the tv is located, have you moved it? Magnesium in the earth caused my tv to have greanish tints in all four corners of my tv. Try moving your tv forward, backwards, or side to side. Let me know if this works.

Cynthia

Feb 01, 2008 | Panasonic PT-47WX49 47" Rear Projection...

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