Question about Akai LCT2662 Television

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No standby LED and no power when turned on

The power board is a mess with what appears to be capacitor leakage over alot of it.Some caps appear damaged but I won't see that until they are un- soldered and checked.I can't believe that AKAI uses such trash compo- nents in their TVs.I did get the schematics for the TV but many component
part numbers differ from what is mounted on the board.

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If the caps are bulged out on the top, then they are bad. I usually replace all nine of them just to be on the safe side. Also, you might want to check your 5vdc standby voltage while it is still hooked to the main board. I have ran across a few with no standby light that is caused from a short (which I can't seem to find) on the main board. The voltage always reads 2.8vdc instead of 5vdc on these. Hope this helps.

Posted on Feb 29, 2008

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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. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
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.

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Hello,
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby 5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out power transistor and zener diode, but if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement. This will help to solve the problem...

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It's sharp 52 inch lcd tv. Model is 52SB55U. I could not turn on the tv. There is no backlight, and only the power and opc indicator are blinking. I tried the factory reset, it didnt work. It could be...


Hello,

Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out power transistor and zener diode...if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I hope this will help in solving the problem....

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Hello,

Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out power transistor or zener diode...but if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hoping this will helpout in solving the problem.....

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1 Answer

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Hello,

Common problem with this TV is the power supply module.
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out transistor and zenerdiode, if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope that this will help in solving the problem, also do take care in handling the fault, because it contains high voltages...

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Hello,

Your power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Good luck


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hello,

Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

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Ur tv power supply board have dead parts call capacitors.U know basic electronic's and soldering?Take ur tv aparts,check the power supply board,that the board the power cord plug into it.Searches all around for these dead gas leakage capacitors,they all way bulges up on it top,or puff up on it top.Replaced these dead gas leakage capacitors,ur tv will have stable LED light and the power will work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

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Now,u plug in the tv u get a solid red standby power red LED light in the front of the LCD panel right?When u push the power button on the remote u hear a clicking sound?Only one clicking sound,not the power supply board problems.It the Tuner board problems.But u can make sure it the power board problems or not.By taking the tv aparts check the power board,that board where the a/c power cord goes into it.Look all around the power supply board check for these leakage capacitors,they alway bulges up it top or puff up it top.No bad leakage capacitors,then it not the power supply board problems.

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Power supply board have dead leakage gases componnents call capacitors.These capacitors are dead or will not work properly.These capacitors alway bulges up it top or puff up it top.U know basic electronic's and soldering?Take ur tv aparts.Go all around the power supply board searches for these bulges or puff it top capacitors.Replaced these leakage gases capacitors,ur power will return to normal functions,and work.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

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