Question about Akai PDP4273M Television

4 Answers

AKAI PDP4273 - press power button, hear click sound, shuts off

After 2 years with this display it is no longer working.

While watching tv today all the sudden the screen turned off and I heard it click two to three times.

Pressing power button did nothing.

I unplugged the display.

Then I plugged it back in and pressed the power button.

I could hear the click sound (like it always does when you turn it on) but the screen never turns on, and then upon pressing the power button nothing happens at all.

I can get it to make the click sound when pressing the power button only after unplugging it and then plugging it in again.

I also tried plugging it back in and then keeping the power button pressed down. When I did this I was able to get the screen to turn on, but only long enough for the blue AKAI screen to show up before the display shut down.

Any help on this is greatly appreciated.

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  • 4 more comments 
  • matterinoman May 10, 2009

    what should i do to rectify the issue?

  • matterinoman May 10, 2009

    what steps do I need to take to resolve this issue?

    Open the display? repair/replace part? I have heard parts for this model are very hard to come by.

  • matterinoman May 10, 2009

    what do the capacitors look like? Is this an easy fix?

    I have never opened a plasma before.

    It is out of warranty, 2.5 years old.


  • matterinoman May 10, 2009

    I have soldered plenty and have repaired computers and other electronics, just never a plasma.

    So, I just need to open it up, and follow the power cord to the main board and look for a busted capacitor???

    Remove capacitor, go to radioshack or frys to buy a like capacitor and then solder it in?

    Also, how much do you think something like this would run to be repaired?


  • matterinoman May 10, 2009

    I plugged the display back in and pressed the power button this morning.

    It worked as normal for about ten minutes before it shut off again.

    Is this still a capacitor issue?

    I want to be sure this is the issue before I take apart the display.

  • matterinoman May 10, 2009

    how can it be that, this is a plasma hdtv monitor.

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It does sound like it is a capacitor problem, blown capacitors are usually curved out or bulg out when they are bad. You can try taking apart and look for the power board and check to see if there any blown capacitors, Most repair shops usually charge about $150-$200 to fix it. I have never fixed a plasma before, but I have fixed numerous LCD panels and 95% of the time it is a capacitor issue and sometimes a transistor issue in the invertors. I am not sure if Plasmas have invertors or not, I think only LCD's do.

Heat is the enemy of electronics, and these sets operate hot. You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections. This model of TV has over 2,000 parts which include millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Integrated circuits and transistors can go bad. This can cause other components to become defective, which can have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again since if the parts that caused the failure to begin with are not replaced. The only way to know for sure what is causing the problem, which parts that are no longer within factory specs and for proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment and the skills to use the test equipment.

I would reccomend having it done by a professional, or getting the TV replaced, preferebly LCD HDTV as they are easier to diagnose and fix than plasma's.

Posted on May 11, 2009

  • proresearch May 11, 2009

    Also to make note I just saw that it worked for 10 minutes then shut off again, Another problem could be an overheating issue, take it apart and clean out all the dust with a can of compressed air doing it in short bursts, dont tip it upside down or hold in for too long as it will cause liquid to come out instead, after cleaning it and it still dont power on properly then it is definately component failure, bad capacitor, transistor, or both.

  • proresearch May 11, 2009

    Please rate my post according to how helpful I have been.

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Basically sir, it is not a capacitor issue. It is a flyback issue or video amplifier. As you have said, there is no picture.

Is there any sound? if there is it could be the two i mentioned earlier. The best way to deal with TV is to take them to a technician and let them do the work. Working with TV is very dangerous since it can electricute once you made a wrong move.

It can be the video amplifier that it is not getting much signal or the flyback has a hole/leak since you hear a sound. The sound is actually the current that escapes thru the holes. So i suggest that you don't plug it again and take it to a technician before you burn your house.

Posted on May 10, 2009

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The photon charges at the back of the tv might be damaged, if ur tv is not under warranty i suggest u to check the interior to see if there is any burnt capacitors at the back..... have a multimeter and test the capacitors
identifying and fixing it shud solve ur problem

thank you have a nice day

Posted on May 10, 2009

  • 2 more comments 
  • SAM JAYANTH CHANDRASEKAR

    hi this s iversh again



    sounds like some slow capacitors in the power supply here.
    If
    you are experienced and can do fine soldering..............take a
    lookat the power board.............where the cord goes and look for any
    puffed electrolyitic capacitors if you see obvious
    ones.............replacing them should solve this.

    if u have no experience with tinkering with tv i wud advice u to find a repairman.... its for ur own safety as a lot of bad burns have happened to people who try to fix plasma tv's.

    stay safe
    thank you
    have a nice day

  • SAM JAYANTH CHANDRASEKAR

    then dont try it urself........ call a local repairman.....


    good luck

  • SAM JAYANTH CHANDRASEKAR

    iversh here


    ask ur repairman to  take a lookat the power board.... ask him to check for burnt capacitors he shud be able to do it


    if u feel i was of help to u kindly rate my service


    thank you

  • SAM JAYANTH CHANDRASEKAR

    yes the procedure u told is correct.... kindly take adequate checks to ensure the tv is plugged off..... replace the burnt out capacitors..... tv capacitors barely cost 50 cents.... the real headache is the soldering.... but since ur ok with soldering.... u shud be able to fix it without any problem...




    thank you

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  • 1,847 Answers

This seem issue with the HT transistor, or rectfying diode from chopper transformer.


Let me know
Thanks
Kevin

Posted on May 10, 2009

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