Hi, When I turn my Akai LCT2715 TV on power indicator blinks red briefly and then turns off. No sign of life. I replaced all power board caps...still no dice. Any ideas ....switch transformer, transistors, etc? I poked around w/ a multimeter - everything downstream (I have no diagram) of transformers has no conductivity to main power in. How do I test for a bad transformer? Thanks in advance. Peter
I have a different thread going, but saw yours and had a question. Is your light blinking steady and then off? or is it a blinking erraticly or even flickering? My bad caps (15 of them) were all on the secondary side of the PSU. I have been told (thanks to Jaimie Hernandez) if you have a steady blinking, then it is very likely that you have a bad zener diode Z3(27v/1Watt) shorted in the primary side of the power board. If that diode is shorted, it's very likely that 2 10 ohms resistors might be open, these resistors are connected to the cathode of Z3. Also check for bad caps on the Primary side.
I had a huge incentive to fix the TV, it is my wife's TV and she has been in my Man Cave since it died. How about that incentive.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given.
This is a sign that your tv needs service.Normally it means the lamp is blown.These are expensive but easy to replace.My lamp only has 5000 hours use out the box.I had to replace it once so far.I would check your manual if you have it available.
This series of TVs has a famous issue with the power board (part number MLT166A or similar). Several capacitors and zener diodes burn out causing some resistors to burn as well. If you are capable of doing component level repairs check capacitors on the board and zeners Z2, Z3, Z4, Z5 and resistors around them. If you prefer to spend hundred bucks and simply buy the working power board for it - ebay is your answer.
If the TV fails to power ON, in about 90% of the time is due to a power supply failure. If you intend to DIY, I would suggest to visually inspect the capacitors in the power supply. Replacing them should correct the failure with the TV.
The solution at this point would be to get the power supply repair since new boards are not longer being manufactured. In about 95% of the time if the LCD doesn't power up or turns OFF by itself or need to be unplug for some time to make work again; those are the symptoms of a dying or defective power supply. I service these power supplies, for more info write to firstname.lastname@example.org
The blinking light on the front indicates a shorted part in the power supply. The power board will need to be replace or repair to restore the LCD functionality.
Let me know if you required further assistance.