Question about Mitsubishi WS-55805 55" Rear Projection Television

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Problem with picture

Hi I just started having a problem with a curved blue shadow along the top of the screen and a blue shadow beneath every image Any suggestions? Thanks Steve

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Re: Problem with picture

This is the typical convergence failure you can read about over and over on this website. It will take a couple of STK amp IC's maybe a resistor or 2. if you don't solder well don't try it. It should cost you a couple hundred bucks if you take it in maybe three in your home

Posted on May 17, 2007

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I have a Phillips 60" rear projection TV. recently

Tv have a problems known as a convergence problems,it is dead.The tv convergence board it is dead,that why ur tv picture are R,G,B colors lines mis alignments,have colors shadows picture or 3D picture lood alike?The tv convergence board require changes 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop will cost u like $300-350 for parts and labors.

Jun 01, 2011 | Philips Projection Televisions

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I have a samsung 42 picture lines top and bottom of screen

DAve1645 is correct!

This is a common problem. Its called a convergence failure.

Problem #1) Convergence


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted

You can see some examples here...


Nov 28, 2009 | Samsung HCM4215W 42" Rear Projection...

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Our television just began having what looks like a 'double screen'...or the picture has a 'shadow'...and also looks as though the entire screen 'curves' the top and bottom of the screen it is...


Thanks for using FixYa. First of all please check whether all the cables from your dish network are fine and connected firmly. If yes then you'll need to pull off the front of the TV, behind the speaker grill there would be a panel. Remove the panel and check for a black box hanging over there. It has 6 controls on it, 3 are marked as focus and 3 as screen. You'll need to adjust the screen. If you turn these too high you can damage the tube. So you need to do only a small adjustment. Turn the color off on the TV and adjust the red, blue & green controls up till you get a fine picture. Also adjust the focus until you get a clear picture.

And, if it doesn't resolve your issue then it is an intermittent blue picture tube, a bad blue driver transistor on the CRT board, a bad connection on the blue CRT board or a problem in the RGB coming from the video jungle IC. The price to resolve the issue will most likely run you about 300 to 500 bucks, unless it is the picture tube.

Please do rate the solution and revert for further assistance.


Aug 16, 2009 | Sony Projection Televisions

1 Answer


If the entire screen is curved, and it is not taking the whole screen, then you have a vertical deflection problem.

If the colors are double and do not match, with lines of different colors around pictures , then you have a convergence problem, often caused by a faulty convergence board.

The curving effect can be a side effect of bad convergence, or you may have both problems at once.

Unless you are a TV repairer yourself, better calling technical support. Usually you can ring the number listed on the owner manual.

Jul 21, 2009 | RCA P52920BL 52" Rear Projection...

1 Answer

Red, Green, Blue curve upwards and cast shadows

that sounds like a typical Convergence IC problem..

this is a picture of what typical convergence ics look like

Mar 12, 2009 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Picture has a blue shadow

Seems convergence out IC is fried in TV so it gives blue shadow.

Check out Convergence Out IC which you need to replace in TV, if you have enough experience of repair of big TV, necessary tools and know basic electronics.

Dec 18, 2008 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Green cruve line

Good Day;
Suspect Convergence IC's STK4274, part Number 2003191. Replace all three IK04(red), IK05(green), IK06(blue).
Good Luck, big IRISH.

Aug 30, 2008 | Hitachi 50UX26B/27K 50" Rear Projection...

1 Answer

Hitachi 46f500 screen messed up after welding on same circuit

If you did manual conv. You have to redo it when you replace the bad parts. Them being conv. ic's replace them and check 1/4 watt resistors that are low value right beneath amps. Careful not to solder any foil pads together or you will have major problems. Very common for do-it-yourselfers. Good luck, Russmann.

Jun 15, 2008 | Hitachi 46F500 46" Rear Projection...

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Screen is curved inward on all 4 sides and there is a red, and a blue line that is curved at the top of the screen

This is a convergence problem.. possible deflection problem... you might need a tech to look at it...

Nov 19, 2007 | RCA HD56W66 56" HDTV

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Descending curved line on screen

if the tv has a portal on the side open it up and make sure the screen is not out of it's track, don't set anything on top of the set it could make it happen also

Apr 13, 2007 | Samsung HCN653W 65" Rear Projection...

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