20 Most Recent Akai PT4298HD Rear Projection Television - Page 5 Questions & Answers

It's only a problem when you try and finance a new bulb ($400.00 for mine). But seriously, the only "problem" is that an older bulb exhibits much lower light levels and the picture has crappy color, brightness and contrast. Keep a coffe can around and put a few bucks in it everytime you watch it. when the bulb finally blows you'll have a couple hundred bucks in there towards a new one. (a little easier to handle)

Packman

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 asa 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 than 30 minutes 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 the best in the repairs. I just saved about$100 for a repairman just to show up.

Yes! an idea that the flyback transformer is shot!


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Replace new batteries,If a unival remote do both new batteries,and re enter the codes.Also clean ur IR on the remote and tv.

The problem is that the convergence board needs to be rebuilt. The board is located up and to the left looking in the back of the unit. It has two large Sanyo stk392-040 amps mounted to it and a grouping of 3.9 ohm 1/2w fp resistors in the yoke return circuit out in front of the amps. It's likely one or more of these will also need to be replaced.
If you're going to attempt this yourself you need to be VERY good at soldering and desoldering and toy should have a good VU meter to check the resistance and tolerance of the components out in front of those amps... Also think about adding a fan to the face of that board with a 9v regulator operating off the 20v +/- line feed. This will substantially keep the amps cooler and less likely to short out again.
If you would like to justa have this done our shop rebuilds these units for $225.00 dollars which includes shipping back to you...
Hope this helps!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

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 the Samsung Model # HCN4226WX/XAA, buy the Samsung BP95-00142E Convergence board for $77. It came to about $85 after shipping. 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 than 30 minutes to install. It is a simple swap procedure, with no soldering. You only need the new board and a screwdriver! Remove the lower back board 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 the best in the repairs. I just saved about $100 for a repairman just to show up

If you have a box between the cable and the tv, it may be an issue withe the box provided by the cable tv. To check if there is an issue with the TV, have it tested using a DVD player, media player box or blue ray that shows HD. Have it connected to the TV to see if it works. If it works, you may need to call up your provided to see the details of the channels, it would probably be the signal.

if the picture looks kinda 3-D
Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK IC’S , not those cheap aftermarket or china made IC’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases you may need to open the set and tell them what the STK numbers are on the chipsGOOD LUCK!!!
Larry Dillon, senior tech/tvrepairkits.com

replace all capacitors on power board.

tru going a google search for your brand and model # then type in remote or try this place to find the model # of your remote then do a google and ebay search for it

http://www.electronicadventure.us/Merchant2/merchant.mvc?Screen=SFNT

Your power supply will need to be replaced

Have u tryed the fused it u didnt chagre it

I would have a service company look at it ASAP. That type of problem can cause extensive damage to the High Votage panel. Do not play it !

Remote sensor problem.

First, You cannot resync the remote, Second the IR sensor may be bad on the tv and third, the Digital bd may be bad. The IR sensor connects directly to the Digital bd which is the brains of the tv. Also, there maybe a stuck button on the remote or the buttons on the tv.

Hello!
If you haven't replaced the lamp before, it's better if you do, if you already replaced it and this issues are still there, it's a possibility that your ballast might be defective, maybe it doesn't have enough voltage to light up the lamp

it sounds like the lamp has expired. replace the lamp

This is a comon problem
There are two large convergance chip's
the are failing .Replaceing them will
corect the problem . The chip range
in cost from 16,00-30.00 .There cheap,
so dont let the shop over charge you
for parts when and if you decide to
repair it.

Hi,
Is it Akai PT4298HD TV or some other model?
Thanks.