Question about Akai PT4298HD Rear Projection Television

1 Answer

Only the red light comes on

Akai pt4298hd rear projection wont power up only red light comes on

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  • wade_steven May 14, 2009

    wont power up red comes on with remote only

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Whats up Wade?

This is DVD MIKE with Perfectimagess.Try this first .Unplug the TV for a while and press the On/Off button which is supposed to perform a "reset".After that, plug the TV back in. It should come on and the Timer light off. The picture and colors might be distorted, but pressing the Perfect Focus button on the remote control resolves this right away.

The problems is a black picture or the TV won't turn on. The Timer light stays lit even though no Timer has ever been set. The colors converge and the picture is pinched. I don't think all of the expensive repairs are necessary, My TV did go out after a week of non-use while out of town (I was out of town, not the TV). I don't know. I'll post more if I learn more. I hope this helps Wade,

Vacuum the dust off of the circuit boards and inside the cavity. TAKE CLOSE UP PICTURES OF THE CONNECTORS BEFORE DISCONNECTING FROM THE CIRCUIT BOARDS. (IF YOU HAVE TO.) TAKE OUT CIRCUIT BOARD MOUNTING SCREWS. AND REMOVE THE BOARDS.

VACUUM THE DUST. LOOK- SMELL AND CLEAN THE GROUNDS, AND CAREFULLY CLEAN THE BOARDS. ASSEMBLE. DOUBLE CHECK CONNECTIONS WITH PHOTOS,
AND PLUG IN, TURN ON AND HOPEFULLY ITS ALL GOOD.

WADE WORK WITH ONE HAND AS MUCH AS POSSIBLE SON!!

DVD MIKE

Posted on May 15, 2009

  • Michael Warren
    Michael Warren May 18, 2009


    Question WADE this came from just answer.com
    I have an Akai PT4298HD rear projection television. I have had it for 3 1/2 years and it has been very good. Last week, it quick working. Via the internet, I realized it was the convergence board. I ordered and replaced it, and now the TV works with one exception. There is a red line in the center of the screen. Is this a focus or setting issue, or is it possible the convergence board I put in is creating the problem?

    Submitted 239 days and 15 hours ago.

    Category: TV
    Value: $15.00
    Status: CLOSED


    +Read More



    Posted by Michael 239 days and 15 hours ago.
    Info Request
    Hi XXXXXXXXXX. Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
    -Could you post a picture of the offending line?
    -Just take a digital picture and click the "tree" above the question box to post it, it has to be smaller than 1Mb though.
    Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.

    Mike



    Posted 239 days and 15 hours ago.
    Reply
    Unfortunately, I do not have a digital camera available right now. However, the line appears as if if was drawn with a permanent magic marker. Towards the top of the screen, there is about a 3/4" dot that looks like a small paint drop. Then down about 6" the line starts and it is a perfectly straight line, as if it had been drawn with a ruler. then immediately beside it is as if the line is double wide in places. There is one more dot/drop. The line is about 1/8" wide at its narrowest, and about twice that where it is doubled up. It is is the absolute center of the screen, and runs vertical. The line itself starts about 8" down from the top, is about 8" long, and has about 8" below it. It is in essence in the center of the screen. The line appears purplish red most of the time, but can look blue depending on what is on the screen. I hope this helps. PS, as I am sure you are aware, this Akai model is a sister to a Samsung model.


    Accepted Answer
    Sounds like your convergence is folding over, probably due to an out of tolerance component.

    Have you tried reseating all connectors?

    Adjusting via the service mode?

    I will be away for a while but will be back later.

    Mike




    Expert:

    Michael

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    September 20 2008

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    4 Years component level TV repair. Ex-Military RADAR and radio repair.




    Posted 239 days and 15 hours ago.
    Reply
    By reseating, I assume you simple mean making sure the 5 plugs or so from the board are in tight and secure? I will try that. I have not spent much time trying to adjust it yet, simply because I had read where people messed their sets up trying to do the manual adjustments. In most instances, it almost sounded as if people simply put in the board and it worked. One other piece of information I neglected to mention earlier, when I try the "perfect focus" button, it only goes up to 44% before it times out.


    Posted by Michael 239 days and 13 hours ago.
    Answer
    If the magic focus is timing out then the light from a certain color is not hitting the sensor.

    I would try getting the service manual and doing manual adjustments from the service menu.

    Another thing to try is this: Unplug your convergence yokes and see if the "mystery line" (for lack of a better word) has disapeared, yes the convergence will be completely whacked while the plugs are undone (only do this unplugging and plugging while power is off).

    If the line is gone then you have a problem with your new convergence board (not un-common)

    Yes it is possible to mess up your convergence royally if you are not careful, I will give you in one sentence the best way to not screw it up here: When it says to "initialize" in the service manual, DONT DO IT, that is a friggin typo that has since been released in a service flash.

    Best of luck!

    Mike


    Posted 200 days and 8 hours ago.
    Reply
    Relist: I still need help.


    Posted 200 days and 6 hours ago.
    Reply
    I have ventured further into my dilemma. I took off the back as someone suggested there could be something on the mirror or on the lens covers. Well, there is nothing on either one. However, when I look down the center (green) projection, I can see the spots/line to which I am referring. What is this, and/or how do I clean it?


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  • Michael Warren
    Michael Warren May 18, 2009

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