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My LG 47LN5750 led tv ,when turned on flashes on for 1 second then turns off. Is it fixable?

1 Answer

The Knight

LG Master 76,851 Answers
Posted on Jun 17, 2019

The Knight

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Joined: Oct 14, 2010

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Main digital board fault.

5 Related Answers

Anonymous

1 Answer
Posted on Jul 06, 2007

SOURCE: TV shuts down

Remove the lamp assembly, There will be a screen on the top and bottom of the assy remove all dust from these screens. also check the tube at the top of of the lamp receptical this is an air cooling pathway. reassemble and fire it up. This worked for me and saved some serious coin judging from some of the other solutions I have seen (lamp and balast) ouch!!!

Anonymous

1 Answer
Posted on Feb 17, 2009

SOURCE: My THOMPSON TV won't turn on!!

Circuit board inside the TV was loose!!

Chi Chu

8457 Answers
Posted on Jan 27, 2010

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

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

Anonymous

4 Answers
Posted on Jan 27, 2011

SOURCE: Vizio m550nv led lcd tv. Problem began a couple

I had same problem. Unplug set for 10minutes then plug it in and let it go thru it's startup routine.

Anonymous

32 Answers
Posted on Nov 01, 2012

SOURCE: My LED LG TV 42" turns on/off by itself. Channels do not change.

Sorry to tell ya but your power supply panel or chip is going out! Mine done the same stuff! Freakin flat screens dont last as long as the older t.v's

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1answer

I have a LG tv model number 47Ln5750-uh it has the stand by light on and when I turn the tv on it shows the LG logo for a split second then the screen goes back wounding if you may know what part needs to...

1Check power board capacitors if swelled then replace them ,
2 check led output voltage at connector on power board. If voltage down come back from led penal then one or more leds fused.
Please replace it.
3 it may caused power board defective too.

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Do I need an LED board for an LG TV?

watch this https://www.youtube.com/watch?v=4DS8_utsLPo

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Jul 03, 2018 • LG Televison & Video

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Have an LG 47LN5750 led tv and the screen is blank, has sound. The logo flashes and goes blank. standby light flashes three time.

1) Check your power plug wiring and replace the fuse.
2) Read the Manual:
http://www.lg.com/us/support-product/lg-47LN5750

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LG 47LN5750-UH has sound but no picture.

Follow the link pleae. TV Boards Buying Guide

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Nov 09, 2016 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

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Have a LG 47 inch tv. 47ln5750. When I power on the LG appears on screen then shuts off. took off the back cover and when I powered on I could see the LEDs flash. problem be led board? Or Led strips?

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Oct 27, 2016 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

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My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.

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Dec 16, 2015 • LG 55LE5400 TV

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I have a Lg LED tv model 47LN5750 that turns on but then stays on the LG "lifes good" screen and will not do anything more. what could be wrong?

Corrupted firmware. A firmware update is necessary. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

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Nov 13, 2015 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

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I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. Still have sound & can see a picture with a flashlight shining on the screen.

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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Oct 19, 2015 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

0helpful

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I have a LG 47LN5750. No picture, sound yes, I see menu when using the flashlight test and have no back lights showing. please help with my next steps in fixing this issue. Just happened this morning.

What you are describing is common in these sets. The power unit tends to cause the LED backlights to fail. It is a 50 dollar parts cost but you have to upgrade the firmware to prevent it from happening again

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Oct 09, 2015 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

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LG 47LN5750 TV has no back light issue-

replace screen it's faulty period ensure it comes with T-con

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Oct 03, 2015 • LG 47LN5750 47" LED TV 1920x1080, 120 Hz,...

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I have a LG tv model number 47Ln5750-uh it has the stand by light on and when I turn the tv on it shows the LG logo for a split second then the screen goes back wounding if you may know what part needs to...

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My LG 47LN5750 led tv ,when turned on flashes on for 1 second then turns off. Is it fixable?

1 Answer

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Related Questions:

I have a LG tv model number 47Ln5750-uh it has the stand by light on and when I turn the tv on it shows the LG logo for a split second then the screen goes back wounding if you may know what part needs to...

Do I need an LED board for an LG TV?

Have an LG 47LN5750 led tv and the screen is blank, has sound. The logo flashes and goes blank. standby light flashes three time.

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Have a LG 47 inch tv. 47ln5750. When I power on the LG appears on screen then shuts off. took off the back cover and when I powered on I could see the LEDs flash. problem be led board? Or Led strips?

My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.

I have a Lg LED tv model 47LN5750 that turns on but then stays on the LG "lifes good" screen and will not do anything more. what could be wrong?

I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. Still have sound & can see a picture with a flashlight shining on the screen.

I have a LG 47LN5750. No picture, sound yes, I see menu when using the flashlight test and have no back lights showing. please help with my next steps in fixing this issue. Just happened this morning.

LG 47LN5750 TV has no back light issue-

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Televison & Video

I have a LG tv model number 47Ln5750-uh it has the stand by light on and when I turn the tv on it shows the LG logo for a split second then the screen goes back wounding if you may know what part needs to...

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