Question about Akai PT4298HD Rear Projection Television

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Power comes on but no sound or video

Hey all...I have an akai pt4298hd, You can hear the tv's power as you plug it in, you try to turn it on, the red light comes on, but no picture or sound. Everybody and their momma has this same problem on the net, but not one post shows exactly what the problem is. Please help. I am trying to give this tv to my Dad for his B-day in 4 days. Thanks

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Re: Power comes on but no sound or video

Hello Prh011, I want you to think for a moment about how come no one can fix this problem with exactly one way of doing it. That is because, a television set is one of the most complex pieces of electronics on the face of the earth, sure everybody has one but the function of the TV has not really changed in all of these years. The electronics however has, it has become more interconnected, and interdependent. I have said this before and I will say it again "There are any number of upto 100 parts that can cause this problem by opening, shorting, or "leaking"" However people ask us as experts to pick one of the 100, without analyzing, troubleshooting, or even looking at the problem. I am sorry it can't be done. In the off chance the person has background in electronics, things are a little better, but not being able to analyize or examine the set very little can be offered in that case. So here is my suggestion, I want you to take the TV to the repair shop, because with what you are asking for it may take a little more then 4 days. However so as not to totally be a killjoy, here are my possible solutions: 1) check for a blown fuse 2) check for a bad Horizontal Output Transistor 3) check for a bad IHVT (Integrated High Voltage Transformer) also called a flyback transformer 4) check for a problem in the Horizontal/High Voltage section of the TV 5) check for a a shorted or opened component in the power supply. There you go 5 (but not nearly all) possible starting points, but totally valid and plausible none the less.

Posted on Sep 26, 2007

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There might really be a problem with the unit. Try unplugging it out of the power outlet and plug it back in after 30 seconds. If your using a power box (voltage regulator), try plugging it directly to the outlet. If all nothing happens, see a local tv tech in your area. The unit could be damaged.

Nov 08, 2009 | Akai PT4298HD Rear Projection Television

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do me a favor, if the set is still together, please remove the back, and find the convergence card... it is on the upper right hand side. Unplug the RED plastic plug ONLY. Now try to turn on the TV. If it turns on, but the picture looks completely out of convergence, then yo uneed to replace the 2 STK392-040 IC's and you will have to test all of the 3.9 ohm resistors on the board. You will usually find 1 or 2 bad. let me know what you find.

May 18, 2009 | Akai PT4298HD Rear Projection Television

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I have an AKAI TV...Model Code #PT4250AX/SMS - Rear Projection TV. The TV was being used and a pop sound was heard and then the tv was black (no audio, no video). Now when you turn on the power the red...

My recommendation is to call a local svc co. Since you heard a pop, it could be anywhere in the set. It requires trouble shooting to isolate where the problem is. I hope this is help-full for you.

Feb 27, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

Akai hd projection tv pt4299hd won't turn on

Sounds like a power supply issue. Does the power indicator light up? Can you hear a click when the power button is pressed?

May 31, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Akai pt4298hd rear proj tv

Unit may be in timer mode. Check menu settings

Apr 22, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Akai PT4298HD problemo

I'm not a repair guy, just happen to have one of these TV's. Seems to me that unplugging the Convergence Board removes it from the equation and suggests something else might be the problem. I got most of my help from here and also from this thread:

The samsung TV is the same TV as this Akai, it's just a rebadged Samsung.

One important difference in my TV from yours. I did have a timer light, and with the back off, I could hear it power up when I plugged it in and turned it on. The timer light would flash then it would go off.

When I removed the convergence board, I could clearly see burn marks on the bottom of the board where one of the amps was soldered on. That gave me some piece of mind in ordering the part. I just scanned that other thread but remember some people talking about the power supply failing as well as the main board, you might pursue those avenues.

I wish you luck in fixing this!

Mar 15, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

AKAI PT4298HD - Does not turn on

Mine had the same symptoms. It was the convergence board. I replaced it and all is fine. the part number is BP95-00142E and is available from It's simple to replace...

you can check this before you buy the part. take off the lower back of the tv. Convergence board is on the right in about the middle of the tv - top of the lower part of the back. comes off with one screw. you can unplug the power (mine was a red plug), then plug the TV back in and it should come on. If it does, picture will be bad, (it can't converge the tubes, obviously), but you should see the picture.

good luck

Jan 28, 2008 | Akai PT4298HD Rear Projection Television

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