Question about Samsung HCM4216W 42" Rear Projection Television

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Replaced bulb and converge problems

I just recieved a broken samsung tv with a broken green bulb. I bought a new bulb online installed it and now that problem i am having is that the automatic convergence wont go past 25%. First i checked the new green bulb and as i looked in it i saw bubbles. Is this normal? Secondly i just tried to manually converge and i got pretty dag gum close but still not a professional job as this is the fist time i have ever taken apart a tv. Also whenever i try to do automatic converge it starts with green boxes goes to red boxes, hits 25% then restarts and never shows any blue. Any info would be helpfull on this problem i am having as i am completely new to the tv repair thingy.

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Re: Replaced bulb and converge problems

After replacing a Picture tube convergence/geometry allignments can be quite extensive and if they're not fairly precise the sensors for the auto conv. can not be calibrated therefore your auto conv. not working as you described. The key is usually the geometry start with the green lines and get them as square as you can then align the red/blue. Since the auto is not going to blue that often means the blue is to far out and the sensors are not picking it up.

Posted on Apr 21, 2007

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Samsung model hl-s4266w.. I can see the TV programs but it has gotten really dark. i think it's the bulb, but when i look on the back, the bulb is still on. Could it still be the bulb that needs to be...

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.

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. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.



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.

TV set after fluid change



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

Jan 13, 2011 | Samsung HL-S4266W 42" HDTV

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Samsung hln617w dlp tv won't turn on. Red temp

Had similar problem. Thought it was the lamp. Examined old lamp but it appeared to be good. Ordered a new one anyway. Changed the lamp but the TV screen would not come on. It would make the usual noise as it was going to come on normally but it would cycle 3 times & then turn off. The LED lights in the front panel would indicate a defective lamp. Then read about the ballast. Changed the ballast & still same problem. Tried starting the TV without the lamp installed & noticed that the color wheel did not spin. Removed old color wheel & discovered it was broken. This appears to be the cause of all of my problems. I wish I new earlier of the test-turn on the TV without the lamp being installed & check to see if the color wheel is spinning. Would have save money on the lamp & ballast.

Apr 08, 2010 | Samsung HLN617W 61" Rear Projection HDTV

1 Answer

I have a philips projection tv, there is a green hald circle at the bottom of the screen also the picture has double images and very yellow and red. I just bought this from someone who keeps telling me its...

It sounds like multiple problems. First of all these sets are famous for bad coolant between the tubes and lenses causing the picture to be degraded causing the foggy picture. The fluid can be changed to clear up the halo's. The double images are convergence issues. Most likely both convergence amps need to be replaced. I hate to say it but it sounds like you got a money pit. Good luck. Thanks for using fixya.

Dec 21, 2009 | Philips Projection Televisions

1 Answer

Samsung HCN5529W 55in Rear Projection can't Perfect Focus

hello What you have is a convergence problem. There is 2 modules inside your set that aligns the colors to have the same geometry and superposed . It is a common problem in rear projection tvs ,
You don`t have to worry about your blue tube , i`m sure it is perfectly fine, it just needs to be aligned through the convergence circuit.
Most often the problem is with those convergence modules that are faulty and need to be replaced.
Hope this will help good luck

Dec 07, 2009 | Samsung HCN5529W 55" Rear Projection...

2 Answers

Samsung 50" DLP - Lamp Light Blinking after bulb replacement

Listen closely. The tv should make a high pitch whine as it turns on. If it does wait and see if it tries this a few times. If yes then check the bulb, I have seen cases where the lamp shoves the power connector back into the set. If the tv starts with a grown or heavy vibration noise, then your color wheel may have broken and needs replaced.

Jul 11, 2009 | Samsung HL-P5063W 50" Rear Projection HDTV

1 Answer

Sony Projection TV KP-46WT500 Convergence Problem and Sparking

You may want to get some help with this install...goto and ask for some help

Jan 14, 2009 | Sony KP-46WT500 46" Rear Projection...

2 Answers

Think this is worth fixing?

trust ME when i say setting convergence after doing repair takes alot of time to do /you can damage set if you do not have service codes and values/ you also must have the hand unit that comes with set in order to even get into convergence circuit, call your repair shops ask if they have a good blue tube for set and how much would it cost to repair?ARE you sure blue tube has been removed from set.?

Jun 13, 2008 | Panasonic PT-51HX41 51" Rear Projection...

3 Answers

Samsung HCN4226W Green Tint Around Corners

sounds like the alignment of the convergence in that area needs to be preformed or you have a speaker or something in that corner

Mar 10, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Convergence problem

Sure I have this set,and have replaced my convergence board. I think there is an automatic convergence with this set because I didn't have to do any manual convergence after I installed the replacement board. Maybe I got lucky....

Take the cover off the rear of the set. (Unplug it first- duh)
Look to the top right, a board is screwed onto a metal support running horizontally across the set. I think there a 4 plugs but mark the ones red, green and blue as they have the same connectors and can be re-connected incorrectly. Unscrew the board from the frame, pop off the connections and put on the new board. My new board came with new connection cables so I replaced those also. I turned my TV on, did a Perfect focus and it looked good as new. I was really proud of myself that day.

But after you get it fixed, turn around and sell the set. I have had alot of work done on mine in the several years I have owned it.

Oh and make your brother pay for the new convergence board. The one I got was BP94-00155A.

Nov 02, 2007 | Samsung HCM4216W 42" Rear Projection...

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