Question about Akai PT4298HD Rear Projection Television

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Top half of screen looks like 3D

Turned on the tv this morning and only the top half of the screen looks like 3D. The bottom half is okay. On a black screen there is a big green line dipping from the top about four inches at its widest point. Our manual does not address this. Tried Perfect Focus and it does not show any progress. Tried the Convergence and no luck.

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The prob. described points to convergence amp failure. have qualified tv tech to repair..john

Posted on Sep 12, 2007

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Hi there,
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Posted on Jan 02, 2017

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I turned My tv on and the top of the screen has red, green, and blue swirl lines, and the rest of it looks like watching a 3D movie without glasses, and the picture looks as if you took out the screen and...


The tv have a problems known as a convergence pictures problems,it is dead.Tv have any colors lines R,G,B mis alignments,have colors shadows pictures or pictures look like 3D?Yes,than the tv convergence board it is dead.The tv convergence board must have it components parts replaced like 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost u like $300-$350 for parts and labors.

Aug 11, 2011 | RCA D52W19 52" Rear Projection Television

2 Answers

Projection HDTV Pansonic 47" Curving blue and green colors on top and bottom of screen.


You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

Let me know if you need any further help

Mar 29, 2008 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

I have a Samsung DLP HLN 5065W and recently the TV started to get Horizontal Lines in it with a 2 inch black horizontal line across the TV and the bottom half you could see the picture and the top half...


If your TV looks 3D, warped, or distorted it likely has a convergenge problem.
If however it just looks dull, washed out, redish, greenish, or blueish or if it looks like objects on the screen have halos the fluid in the lens has soured.
You can search google for parts or you can get the parts with repair instructions from sites such as www.TvRepairKits.com

Feb 27, 2011 | Samsung HL-R6168W 61" HDTV

1 Answer

I have a tz61v61 toshiba rear projection. The bottom half of the screeen is ghosting red, blue and green. it looks like 3d without the glasses. top half of screen is fine.


If your TV looks 3D, warped, or distorted it likely has a convergenge problem.
If however it just looks dull, washed out, redish, or if it looks like objects on the screen have halos the fluid in the lens has soured.
You can search google for parts or you can get the parts with repair instructions from sites such as www.TvRepairKits.com

Feb 24, 2011 | Toshiba TZ61V61 61" Rear Projection...

1 Answer

I TURNED MY TV ON YESTERDAY AND IT WAS CLEAR. I TURNED ON THIS MORNING THE PICTURE HAS GHOST THE PICTURE IS BLUIRIED. THIS HAPPENED 3YRS AGO AND THEY HAD TO REPLACE A BIG BOX ITEM FROM INSIDE THE TV


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. Repair kits with instructions are also avail from 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. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jan 29, 2011 | Sony KP-65WS510 65" Rear Projection...

1 Answer

My TV (module # KP-57WS500) is in a weird double vision view as if it is in 3D. with blue,red, colors. top and bottom of the screen also curve into the center of the tv. worked perfectly fine night...


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. Repair kits with instructions are also avail from 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. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Nov 24, 2010 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Sometimes after the my TV is one for 20 mins or so the screen warps, shooting white/pink/green lights across the top and bottom of the screen and placing a horizontal black line at the bottom like hal


Your TV most likely has a problem in the convergence circuits. ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem


  • 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.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

May 19, 2009 | Hitachi 50FX20B 50" Rear Projection...

1 Answer

Picture looks like 3D without 3D glasses on???


The cost I don't know, but this can be fixed. I'd say shop around a bit. Make sure the repair person is certified for your TV's manufacturer. There are generally 3 lamps in projection T.V.'s, Red, Green, and Blue. They have to be aligned for the TV to project a clear picture. A credible TV repairman should be able to fix it. Depending on if it's new enough to be under warranty they may cover it as well. Really the only reason to get rid of it is if you want to get a new TV anyway. Depends on the cost of having the lamps aligned.

Dec 30, 2008 | RCA HD52W59 HDTV Projection Television

1 Answer

TOSHIBA 65H82


you need to replace your 2-convergence ic's #STK392-110 you need to replace both ,,they are attached to 2 big heat sinks and identified as q-751 & q-752 you can get the ic's you need plus free tec support and installation instructions including pictures at the link I gave you.
http://servicemanuals.vstore.ca/

Apr 12, 2008 | Toshiba 65H82 65" Rear Projection...

1 Answer

Fault on TV


something fried .. sounds like the vertical has gone ,
call a tech.

Mar 07, 2008 | Televison & Video

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