Question about Akai LCT2785TA 27 in. LCD Television

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TV will not turn on. If you turn the power switch off and then back on the tv will then turn on. I have read that many others have had the same problem but have not heard what the solution is?

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  • Akai Master
  • 5,568 Answers

If it's failing to turn on reliably, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself. 
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core (no laminations as with a line-frequency part) transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.
 
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.  
 
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself but it will likely have the same problem eventually unless they have altered the design.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.

Posted on Nov 26, 2008

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The first thing you should do is consult the set up procedures on Page 8 / Section 4 of the manual. This will assure that you have completed and exited this important section properly.

If the TV should lose power (power outage, blown fuse or circuit breaker, cord removed from the outlet, etc.) the TV will likely need to have the setup performed when powered again for the first time. Likewise, a TV that is plugged into an outlet controlled by a switch, will lose power when the switch position is changed. Since switched and un-switched wall outlets look the same, you will need to unplug the TV and plug in a table lamp or similar and operate switches to see if it goes out. You will need to try both the upper and lower outlets as they can be operated independently of each other. If you find that the outlet is switched, you will either have to stop using the switch or find another un-switched outlet to power the TV.

I didn't see it mentioned in the manual, but some TVs have a dedicated power and a dedicated on / off button. If the power button is set to off, the TV will shut off and the remote will not be able to turn the TV back on until the power button is turned back on. The on / off button on the TV allows the TV to be turned on and off with the remote - or the on / off button on the TV. Again, this will only work if the dedicated power button is on. If the power button is set to off, it may be causing the TV to lose the set up information - requiring that it be done again. Make sure that you are using the remote to turn the TV on and off - or the correct button on the TV if you do not have a remote.

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First repair the power supply's capacitors and then any other component if needed :)



Please rate if this helps :)!

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I repair these power supplies. Write to jah2mil@hotmail.com

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