Akai LCT2721AD 27 in. LCD Television - Answered Questions & Fixed issues

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

I swiveled my standard mount a little, and only 3 of the 4 screws fit, but this has worked for the past several years.

crack in the screen means time for a new TV...part if even available on this model would cost more than a brand new set.

IF YOUR UNIT HAS AN ATSC TUNER THEN IT IS HD READY. SEE YOUR OWNERS MANUEL. HOOK THE ANTENNA TO THE RF (ANTENNA) CONNECTOR .GO INTO THE MENU AND AUTO PROGRAM CHANNELS. GO TO CHANNEL 5 AND SEE IF YOU HAVE 5.1 OR 5.2 IF SO YOUR DONE.

No did not get it fixed I am in the process of moving from NJ to SC and don't have time this couldn't have happened at a better time.I will just move it broke.
Cheers William Ash

Hi, Cheri Torres with DISH Network Customer Service here. There could be a few different reasons that your HDMI cable is not working. The cable could have gone bad, sometimes the cable is loose and you will need to make sure it is secure or when the cable was taken out of the TV or receiver it may have been accidentally damaged. What are you seeing on the screen when you have the HDMI cable plugged in? Please make sure that the the TV is on the correct input to receive the picture from the HDMI cable. You can also try to reset the DISH receiver box by unplugging it from the wall for 10 seconds. Another option you can try is replacing the HDMI cable to see if the cable has gone bad or been damaged. The last option to try would be to use the cable on a different device such as a blue ray player or gaming unit. If the cable does work on a different device then the receiver may be the issue. I hope this information helps and if you have any further questions or concerns please let me know!

Hi,

If the supply voltage are present in the power supply board, the fault is between the backlight or the inverter board. Once there's no high voltage generated by the high voltage transformer within one second upon start-up, backlight feedback circuitry is turned off and trigger that kind of symptoms.

You have to check for busted backlights, it will produce an overload to high voltage transformer and will trigger the feedback circuitry. Busted bulb can't be test using the multimeter but has a physical indication of fault like blackened end. You can easily identify it by physical inspection. Much better also if you have a spare bulb to swap to a suspicious one.

Check the resistance of high voltage transformer's secondary winding (directly connected to the bulb by two wires, pink/white) using a multimeter. Compare the reading, all secondary winding of the high voltage transformers should be the same, if you found lower/higher resistance from one transformer, it is considered faulty.

Jdvillanueva

Make sure it is on channel 3. Then use the cable remote

Ive reviewed and assisted anoter person who had a similar problem that caused the tv to malfunctioin simialr to yours. After doing some short research and the other person who had the problem, came to find out that 4 resistors failed on the main board causing this to happen. It also could be the backlight of your Plasma screen tv, or your Plasma screen itself is shot.

I would recomened that if you have no active warenty to give a visual inspection of the Tv, via removing the rear black plastic pannel to see if any of the corisponding chips have any burn marks or excessive heat stress. these items seem to be failing about the 12 month mark

Good luck

Hi winnernaples,

This is an indication of out-of-regulation in the power supply section. This was caused by leaky/dried electrolytic capacitor in that section. It will dropped the supply from normal voltage and will disable the unit. It needs a warm-up to make itself stable but the symptom will get worst until the unit will not even power up. Leaky capacitor has a bulged/dome at the top/bottom side and can be easily identify. See sample picture of below.

Dried capacitor has no physical indication of fault, you must have a capacitor checker/tester to determine its condition. Your unit will back to normal again once leaky/dried capacitor replaced with new one(same capacitance and working voltage that is printed in the body itself).

Click this LINK for more information on how to replace capacitor.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Your power supply board can be repair for as low as $37, please click this LINK.

Also check if your unit is under warranty /extended warranty, avail it because the manufacturer of your unit will fix it for free. Don't open the back panel, this will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

Please read below:
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

you heave a problem with power sam electrolit capacitors

Universal remote controls (like the one for your comcast cable box in which it allows you to control other devices) have "the most popular" IR codes programmed inside of it. When you type in the numbers "10812,10702, etc" you are telling the remote to use that particular IR code within its "database"
The key thing to know is that universal remotes do not have every code, just the most popular. If you have tried all of the codes listed in the manual for you model TV there's not much you can do.

• Try searching for a code. Some brand names, such as "Akai" may have other manufacturers parts inside of it, Searching usually is done by going through certain key-presses on the remote to try all of the codes available.
• Buy another Universal remote, not all remotes are created equal as some have mode IR codes built in than others, if you have an odd brand TV, it may be more difficult to come across one that works.
• Buy a learning universal remote, although usually more expensive these remotes will allow you to "learn" the IR codes from your old remote to the universal remote.

I hope this helps.

Whn you try to power it up does it attempt to power on before going red or does it just stay red? If it just stays red then its definitely a case of faulty power supply board. The easies way to resolve this problem would be to replace the power supply board, which can be obtained for about 50-75$ from shopjimmy.com. So let me know if you wish to fix it yourself

You need to do more torubleshooting, bad caps can look normal but they can have high ESR which are bad for switching power supply circuits.
Need to check the DC voltages, also try disconnecting the power cables to the backlights inverter board to see if it will come on normally isnce the light blinking can indicating it is sensing shorted circuits so it goes into shutdown/restart mode.
Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series. Please post back what you find. Please leave rating if it helps. Sorry I cannot find free service manual for you.

hiii.....
If the power supply is supplying the main board with the correct amount of volts, your controller board or your on off switch panel is malfunctioning and needs to be replaced. If its the whole board your looking at a few hundred unless you can find the same tv with a broken screen and just swap parts.The on/off switch board is cheaper but you have to remove alot of interior parts to access and becomes a hastle.
thank u rate me!!!

power supply problem.check the power supply section.

I'm assuming that you have tried the buttons on the case with the same result. In that case the red light is still on because the power source is still in Stand-by - either the controller circuit of the tv is faulty and hasn't send the command to start or (much more likely in this model of tv) the power source has been started, a short caused by a failure in the inverter board is detected and the protection system puts the power board back into Stand-by to protect the rest of the tv's components.
To find out precisely what is the failed part the tv must be opened and the voltages on the power source tested - the one powering the failed part will be significantly lower than normal. This is a job for someone who knows electronics and has at least a basic experience in repairing tv's. If you're not such a person then call one.

try to check the cables that connects at the back of your tv specially the aerial connection.