Question about Akai PT5598HD 55" Rear Projection HDTV-Ready Television

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Akai PT5998hdtv sets goes on clicks and goes off

I opened the back of set and noticed the blue lamp is flickering at the same rate as the clicking noise. Red and green lights are on steady, Set turns itself off and then restarts....clicks very fast, blue lamp flickers and set goes off.

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Do not panic! Do not throw your TV away like I wanted to! Here is what may be the solution for most of the members who have posted their complaints here recently. I am not an expert, but I followed all blogs from various websites and forums, and the conclusion was the same;replace the convergence board for this model. I purchased it from www.partstore.com and since this Akai is the same model as a comparable Samsung Model, buy the Samsung comparable Convergence board for $77. It came to about $85 after shipping. Call them if you need the exact model #. The Convergence board has two black STK ICs and two colors of wires, a gray kind and a blue kind,all which have 'pins' and can easily be unplugged from the circuit board in the TV. It is basically a complete system that takes less than30minutes to install. It is a simple swap procedure, with no soldering.You only need the new board and a screwdriver! Remove the lower backboard of your TV where the cables are plugged in (do not unscrew all the screws for the screen, as it is unnecessary, and might just damage your screen if you are not careful.) It has a u-like shape and comes off easy.Detach the gray wires connecting your old board to the rest of the circuitry, and detach the blue wires connecting the old board to the circuitry. On the old board, there are connectors marked,from left,blue, green and red. Detach those from the old board, and mark the wires so that you may connect the correct the wires to the new board. You then unscrew the only screw connecting the board to the TV,and unhook the board from the TV. Hook the new board to the hooks which held the old board, and screw the lone screw to the board. Plug the gray cables from the new board to the connectors where the gray cables from the old board were,and do so for the blue cables. Connect the multicolored cables to the blue, green and red, just as was done on the old board. Reattach the cover and test the TV. Please do not replace the two STK ICs only. When I removed my old board, I realized that there was a burn mark, where the ICs were, but maybe it was a fuse.You may replace the ICs only to discover that it was another problem.Good luck, and I wish you all thebest in the repairs. I just savedabout$100 for a repairman just to showup.

Posted on Dec 11, 2008

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Akai rear projection tv suddenly stopped working.


This set with Akai is actually made by Samsung (they own and use the Akai name).

If lamp light etc and you have heard a cracking sound it may be the color wheel.

You can remove the lamp and look where it faces--look and the wheel can be seen----is it shattered or missing plastic pieces?

The wheel commonly fails in this fashion and is turning at over 12,000 rpm. The set will detect if the wheel is stopped or moving too slow and just what you describe will happen.

Wheel is widely available and You Tube has video instructions for replacing them by model number.

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I took the back of the tv off and the blue lamp is not bright like the red and green. Could this be a coolant problem or lamp. I have the PT5492S Akai rear projection TV.


The blue is usually dimmer than the other two lens; what I would suggest is try to look into the lens with the set on; BE CAREFUL AND NOT TOUCH ANYTHING INSIDE THE SET.

If the red and green show a picture but the blue looks like a floodlight you have bad Glycol in the blue tube (common in these sets).

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Before you rate this information let me know what you find.

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Akai PT5499hd that has suddenly lost color alignment


The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the 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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

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Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

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90918988

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Flickering


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If you're certain the lamp is good, it's probably the ballast. The ballast has enough juice to power the lamp, but it's unable to maintain a steady consistent level of power, hence the lamp flickering. Changing the lamp may temporarily resolve it because a new lamp is more easily maintained than an older one, but if the ballast is failing, the problem will recur and probably shorten the life of the lamp. The ballasts cost around $70-80. Replacing it can be done by the electronically adept end user, or you may need a service tech. The problem with a service tech is that some may not acknowledge that the problem is the ballast especially if the intermittent flicker is not happening while he/she is examining it.

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Pop....now dead in the water ...clicks in back


CHECK THE LAMP MORE THAN LIKELY IT BLEW
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No picture, no sound?!?!


This could be a number of things. Your lamp could be bad or it needs to be reseated to the ballast. The lamp is trying to light and it will make the ballast flicker (that is the clicking sound) or your ballast is bad and it needs replaced (it will flicker and click too). Or your color wheel is broken and it will make a clicking sound when turning. If the color wheel is not spinning or broken it will not light the lamp. No lamp no picture.

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