Question about Akai PT4799HD Rear Projection Television

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Burning smell and distorted picture

My Akai PT4799HD Projection TV's picture all of a sudden became distorted and started to smell like "electrical" burning. The TV is less than 2 years old and has been otherwise perfect. What is the problem and is it worth the expense to repair it (if possible)?

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Re: Burning smell and distorted picture

One of the components in the horizonatl deflection circuit went bad like a capacitor,the price will depend on the actual part that went bad and your location,the service call in NY could be 300.00 but in pittsburgh might only be 150.00.I still belive is wort repairing.

Posted on Oct 18, 2006

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Screen distorted and burning smell

Those dead resistors that the cause,u are smelling burning plastics.Try website to buy a whole convergence board for the replacement.The Samsung/Akai are using the same convergence board.

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Color distortion in an Akai ( Cheaper model Rear Projection tv) I

Ur convergence is dead.Try Tv repair
Buy a whole convergence board replaced it.

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Where can i get a convergence chip for PT4799HD akai tv?

I'm fairly certain that particular Akai model contains Samsung parts. You can contact Samsung at 1-800-726-7864 to check pricing and availability of the part you seek.

Jul 12, 2009 | Akai PT4799HD Rear Projection Television

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I was watching TV this morning, and I heard a slight pop from the back of the TV the picture then became distorted, blury, and off color. There is also a "burnt" smell coming from the rear of the tv, I...

One of your capacitors n the video board burnt out. You will have to use a multi-tester or capacitor tester with service manual to determine which capacitor it was that burnt out.

Jul 06, 2009 | Akai PT4799HD Rear Projection Television

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I was playing a game (PS3) and I heard a slight "pop" from the tv

User can't really fix this at all. Even a regular TV shop would have problem replacing individual components. What you can try to do is maybe order the board that has the burnt components, and raplace it yourself.

Jun 29, 2009 | Akai PT4799HD Rear Projection Television

1 Answer

Akai PT4799HD - Bluish and Distorted Screen

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.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

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 - TV may also make a chirping noise.
Here are some photos of convergence problems.


Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from

Mar 01, 2009 | Akai PT4799HD Rear Projection Television

1 Answer

Burning smell and pic went out

Power supply board it has 2 thyrisitors and needs to be resolder .

Nov 29, 2008 | Akai PT4799HD Rear Projection Television

1 Answer

Akai tv has failed to work

There are many circuit areas inside a TV set that can have burning components. Since you describe a colour change, I would think the fault may be in the video processor, screen biasing, or video drive path.

Jerry G.

May 22, 2008 | Akai PT4799HD Rear Projection Television

1 Answer


My set had the same issue with the picture and burning smell. On my set, I just removed the cap and the set works great without it.

Aug 08, 2007 | Akai PT4799HD Rear Projection Television

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