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crwdns2944351:0crwdnd2944351:0LG 47LN5400 LED Replacementcrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Wayne Seltzercrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Wayne Seltzer

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crwdns2933771:0crwdne2933771:0
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LG 47LN5400
Type
replacement
Thing
LED
Title
LG 47LN5400 LED Replacement
Introduction
LEDs were supposed to last forever, right? Well, maybe not.[br]
When one or more backlight LEDs fail in an LCD/LED flat screen television, none of them might turn on.
In the case of the [https://www.lg.com/us/tvs/lg-47LN5400-led-tv|LG 47LN5400], the symptom is a brief flash of the LEDs when first turned on, then a dark screen. Sound is fine.[br]
Apparently, the LED power supply shuts down for the failure of one or more LEDs, leading one to the incorrect conclusion that the power supply has failed. [br]
[br]
This video, “[https://youtu.be/Bf5T2wwtydY|LG No Picture, Screen Flash 47LN5200 47LN5400 47LA6200 47LN5700 47LN5750 47LN5790],” provides excellent troubleshooting and repair steps.[br]
[br]
The easiest way repair is to purchase a complete set of LED strips (12) and replace them all. No soldering. In fact, if one LED has failed, more may fail in the near future.
But, it’s a $45 fix.[br]
[br]
The individual surface-mount LEDs are about $0.11 each, but you need to buy 100 or so to get this price.[br]
[br]
The LED strips have a copper plate, so one needs to use a hot air gun to heat the copper completely, A surface mount hot-air station probably won’t be able to get the copper plate hot enough to melt the solder.[br]
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Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
To reassemble your device, follow these instructions in reverse order.
Author
Wayne Seltzer
Public
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crwdns2943215:0crwdne2943215:0

  • Heat Gun x1 added.
  • Phillips #1 Screwdriver x1 added.
  • Multimeter x1 added.
  • Tweezers x1 added.
  • Benchtop Power Supply x1 Need to output 12 volts and 24 volts DC to test LED strips. added.

crwdns2943213:0crwdne2943213:0

  • LATWT470RELZK LEDs x1 added.
  • 12Pcs x 47" LED Backlight Strips Replacement for 47LN5200 47LN5400 47LN5750 47LN5790 47LN541C LC470DUE 6916L-1174A/1175A/1176A/1177A x1 added.

crwdns2935255:0crwdne2935255:0

  • In Progress added.
  • Community-Contributed Guide added.

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