Question about LG Televison & Video

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Tv Problem. LG 65UF6450-UA When powered on, LG logo appeared like normal. Screen went black. Nothing happened. Unplugged and let sit overnight. Powered back on and black screen. No sound. No backlight. Did “flashlight” test , pressing menu , only can see some static and different shades of grey no words and no menu. Tv made in 2015. I will be removing the back to check for blown capacitors or burnt circuit board. Is there anything else I should be looking for and testing. I have a multi meter and am pretty proficient with electrical.

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  • LG Master
  • 10,535 Answers

Hello Roe, for what you are commenting, it would seem a feeding problem, which can be either on the Food Source plate or on the Main plate, where the sub-sources are located
I send you the link of the service manual, control the voltages, remember to download the high voltage capacitor of the primary stage of the source
I hope you can solve the problem
Greetings Franco Dosil

Hola Roe, por lo que comentas, pareceria un problema de alimentacion, que tanto pueden estar en la placa de Fuente de Alimentacion o en la placa Principal, donde se encuentran las subfuentes
Te envio el link del manual de servicio, controla las tensiones, recuerda descargar el capacitor de alta tension de la etapa primaria de la fuente
Espero puedas resolver el problema
Saludos Franco Dosil,da20a5b273d3354edf2a181680ef2b3f/no_html,1

Posted on Jun 17, 2019


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Posted on Jan 02, 2017



  • 34 Answers

SOURCE: I have an Envision H170L monitor that goes dark OR MONITOR

take your plate a part, without desolding anything, reconnect your ccfl's to your invertor , this is how I found that with only 3/4 my monitor ccfl backlights worked. Monitor had classic for 2 seconds and I coud see a windows shadow (I changed my capacitors).my was a kit assembly plate and disassembly easy, light clips and small screws, gentle, movements, set your work bench very clear, tube break, push from the sides where they plugged together always!
I guess from this that the inverter self test check all the ccfl's!
hence the on / check/ off screen (the high power bit, leaving the lower power bit on)

Posted on Feb 08, 2010


  • 1 Answer

SOURCE: I have a Samsung ln32c450e

tv wont come out of sleep mode

Posted on Jan 05, 2011


Shahid Electronics

  • 10594 Answers

SOURCE: I have a Soyo mtsytpt3227ab

It seems back light inverter board is defective in said symptoms because you get sound in tv but no picture. Please point strong flash light at tv screen to observe faint image, if image is there then replace back light inverter board that is available with
And if no faint image found then power supply board would be defective and it is available with
Hope these info will help.

Posted on Mar 14, 2011


Todd Hill

  • 433 Answers

SOURCE: I have a 32" AOC Envision L32w761 LCD hdtv with no

need to ck for your 24 volts going to your inverter board if missing ck power supply

Posted on Oct 07, 2011

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