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No picture but can hear sound and see picture using flash light on LG 47LN5400. Can someone tell me what needs to be fixed?

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6 Suggested Answers

Anonymous

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 16 Answers

SOURCE: no picture and flashing green light

If u'r PC is OK, then this problem is showing when the main PCB of the monitor failed. This is 3 yr warranty monitor, contact the LG service provider in your area. They will change the PCB. Here is the link to get the service center info
http://www.lgservice.com/

Posted on Feb 25, 2008

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localwonder

Michael Masters

  • 6784 Answers

SOURCE: Red light flashing, no picture/sound!!!!

HI, this unit has 3 main fuse links on the main board that may be blown. the fuse links should be check before you move further into the diagnosis stage. once you have checked the fuses and they are still in a working state, this will confirm a power supply board failure. this board provides and regulates the current flow and distribution of it throughout the entire unit. If the fuses are fine and the power supply board is damaged, the green light will come on briefly then, the main control will notice that the power supply is not functioning properly. Once the main control board senses an abnormal current, it will shut down the TV rendering the red light warning. The list of fuses to check are below. Remember, if they are fine and working, the issue will be the power supply board itself and, it will need to be replaced.

FUSE CHECK LIST--

3A 12v- fuse----(242208600623)
SM 3A 125v-fuse----(242208600657)
500 MA-fuse-----(242208611092)

PART NUMBER FOR POWER SUPPLY BOARD

(996500036816)


Please rate and god bless:)


Posted on Apr 13, 2009

hmantj

HmanT

  • 1 Answer

SOURCE: I have a 47 inch LG model 47LN5400 and obviously the back light is no longer working. There are 3 boards, power, main, and T-con. Can anybody tell me which board I should replace?

One suggestion may be to check the ShopJimmy videos on YouTube. There is a flashlight test you can perform. I remember someone who had a similar problem as yours and they were directed toward the T-con board.

Posted on May 18, 2015

gopakumarg43

The Knight

  • 76237 Answers

SOURCE: How do i fix it

The logic board is faulty. That chip can't be replaced by normal soldering techniques. Replace the board. If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Jul 11, 2015

gopakumarg43

The Knight

  • 76237 Answers

SOURCE: Lg tv model 47LN5400 turns off after a few seconds, the screen lights up but doesnt even say no source....

Main board fault. Replace it. 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.

Posted on Jul 11, 2015

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