Question about Akai LCT2785TA 27 in. LCD Television

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No picture I found 4 blown capacitors and replaced,,, I now have a green light and sound and can change channels but have no picture

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Are you sure you replaced all of the bad ones?Did you look at the top,and bottom of all the capacitors?Can you see the picture if you shine a flashlight on the screen?Did you replace any capacitors on the inverter that lights up the bulbs for the backlight,or just the ones on the power board?I hope this helps.If you have any questions,please let me know.Thank You very much!


Tyler

Posted on Nov 02, 2008

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No picture or sound with a red flashing power light. Have replaced the convergence IC's but no change (do not have the chirpint sound). Removed main power board & green LED does not light up


On that model the conv IC is usually not the solution. I believe its the blown capacitor problem with is an easy fix. Check the site www.TvRepairKits.com for a repair kit.

Apr 11, 2012 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

46"


Hi!
That's a clear indication that you have a bad power supply in your TV.
If you know how to DiY...I suggest you open your TV. Locate the power supply section, it is where the end of the power plug is connected. Replace all blown or bulge or leaked capacitors with same value. That will fix your TV problem.
The hardest part is to disassembling your TV cover, cause you will need to pry off the snap in lock at the edge of your TV.

Power supply board should look like this. Examine the capacitors in the board
power%281%29.jpg2_23_2012_11_31_16_am.png

After replacing blown capacitors...it should work again.
caps%281%29%281%29.jpg

Things you will need.
1. A plastic flat end screw or any object with flat ends....to fry off the cover
2. Soldering iron.
3. Soldering lead
4. Soldering pump.
5. Flat and Philip Screw
6. Replacement capacitors (of same value with the blown one) that you can buy to any electronics store.

Hope it helps

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My pyle plmra 220 600 watt 4 channel amp blew out, pyler said it would be 50 dollars to send it in to them so i said to heck with that and oppened her up and found a capacitor blown, but when i replaced...


outputs also blown, go to ebay and buy a better amp form the same price you would have paid for pyle to fix that one, just keep playing with that one and you will get better at repairs, thats how i learned to fix amps.

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Shutdown after video comes up the green power light stays on but the set will not shut down while changing channels. (philips 27 pt543s) ic702 eeprom and ic7200 control/signal processor has been...


Re:"shutdown after video comes up the green power light stays on but the set will not shut down while changing channels."

Hi.

I do not think this has anything to do with logic circuits and video processing. When you stay on one channel the horizontal and vertical alignment circuit works more than if you change channels all the time.
This is just a guess, but have a look at convergence ICs. when you keep changing channels the power amp ICs (or transistors) go on and off, if one of them is defective it will overheat and shut down.
Other possibility is an internal tuner failure. Also test using a DVS or VCR.

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Ur tuner board is dead.Replaced this board to get picture back.Tries Shopjimmy.com,Ebay.com for the board part.

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1 Answer

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Check the power supply first for bac capacitors (learn more here about bad capacitors: http://en.wikipedia.org/wiki/Capacitor_plague)
I had replaced capacitors in my, hopefully it did not cause damages to other circuits such as backlight inverter board.

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1 Answer

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