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Hi, I have a Blue Diamond flat screen tv, it powers on but there is no picture or sound. Would you have any idea of what the problem might be?

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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Apr 18, 2017

6 Suggested Answers

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Posted on Jan 02, 2017

  • 2318 Answers

SOURCE: Philips flat screen tv will not power up.

Symptoms of a Defective or dying Power supplies on LCD TVs.
1. Light(s) on the front panel are behaving not normal example, blinking, amber color or
not steady, fainting, etc.
2. TV not turning ON properly.
3. TV turns OFF by itself.
4. Needs to be unplug to many times to make it work.
5. Humming or high pitch noise heard through speakers or at the back of the TV.

I repair these power supplies. Write to jah2mil@hotmail.com if you require further assistance.

Posted on Dec 20, 2008

  • 8457 Answers

SOURCE: JVC i art 32" flat screen

Ur video ic inverter board is dead.
U need a new one.

Posted on Aug 19, 2009

  • 6 Answers

SOURCE: my tv screen just went blank i still get sound but

its the motherboard. i got the same tv with cracked screen. i can sell you the motherboard for cheap or i will buy your lcd to fix mines. if interested email me at quoc5539@msn.com

Posted on Oct 25, 2009

  • 1 Answer

SOURCE: No picture on Westinghouse flat screen tv

westing house flat screen tv hd...has sound no picture

Posted on Jan 15, 2011

AJIN G
  • 6694 Answers

SOURCE: no picture but have sound

Hi,
Your TV have problem with the back light inverter board. This type of complaint can occur under two circumstances.
1.Faulty electrolytic capacitor in the power supply board
2. The back light inverter board.

If you have knowledge in electronics then check the power supply for any faulty or budged electrolytic capacitor. Have adde the picture of faulty electrolytic capacitor how it will look like. check the link. faulty capacitor .

If the are no such faulty electrolytic capacitor then you have to replace the back light inverter board. There is no repair possible with inverter board because its spares are rarely available.

You have didn't mention any model number of your TV. so its not possible to add the exact picture of the inverter board.

Ajin

Posted on May 08, 2012

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