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Lg tv initialization on screen and not going on and after 20times blnking led going off &agin loop

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  • 166 Answers

Sounds like a faulty main pcb in your tv

Posted on Jun 26, 2014

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Posted on Jan 02, 2017

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SOURCE: LG 50 IN. PLASMA TV MODEL # 50PC1DR . POWER

Power supply board is dead,replaced the power supply board will get power.

Posted on Jan 27, 2010

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My LG tv model number 42LN5400-UA no picture


It is a common problem for the LG 42/47 LN series LED TV, the problem is defective LED back lights strip (strips).

You have to open the display panel to find the bad one & replace it. The part number usually is printed on the strips, read 6916L-11XXA, you may purchase it from EBay.

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If you wish to get some details; check the site linked here. Pull up older posts.
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Disassemble & reassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.

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18 month old LG 43" LED TV. Screen goes dark, but can be seen if you hold a flashlight up to screen. Sound is fine.


The inverter supplies the voltage to activate the screen. There are usually 2 boards, a slave and a main board. Sounds like one of them is leaking voltage and causing the screen to go dark after the initial start up. Make sure you didn't joggle something loose while you were replacing the power board check all connections. GL

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LED screen comes on and goes black


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My LG 42LN5400 LED TV turns off and on in an endless loop. There is some light on the screen when it comes on, but then goes black before turning off. What part needs to be replaced to fix this?


seems like the issue with the power circuit .. the LED must be fine that is why you see the back light when powering on ..

do not replace any parts manually, call in a technician, incorrect part can do more harm than good.

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How do I reset my LG 55"UHD LED LCD 100Hz Model No 55UBB850t TV. When tv was initialy set up we said yes to set top box accidentally but we don't have one. I have TV running through Austar but we ha


http://www.lg.com/us/search/srch_manuals-tab?customerModelCode=55UB8500&mobileFlag=N#

Restoring the Default Settings
mr14_home.png ">w14_settings.png ">General > Reset to Initial Settings
Delete all the TV settings data and reset the TV. All the options in the Settings Menu will be reset to the default settings.
After reset, the TV will automatically turn off and on.
Type the password to Reset to Initial Settings
Do not turn off the power during initialization.

Jan 04, 2015 | LG 55" Black UHD 4K LED 3D Smart HDTV With...

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TURNED ON, HEARD A CRACK SOUND, NOW JUST A BLNKING RED LIGHT? PRIOR TO THIS THE COMPUTER WORKED FINE!---MONITOR WORKS ON ANOTHER COMPUTER....I GET NOTHING ON THE SCREEN & THE DISK UNIT DOESN'T...


If the power LED is blinking red, that's usually the PC telling you there is an error. Is it an HP/Compaq? The number of blinks can tell you what the problem is. If you heard a crack sound when you turned it on, I'm willing to bet the power supply went. You can go to the manufacturer's website and look through their Support Information and see what the red LED tells you.

Oct 03, 2009 | Computers & Internet

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