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LG 47LN5400 LED Replacement

Wat je nodig hebt

  1. LG 47LN5400 LED  Replacement, LED: stap 1, afbeelding 1 van 1
    • Set up a table large enough to hold the TV face down.

    • Place a soft cloth or towel on the table to protect the LCD display.

    • Remove the screws holding the stand.

    • Remove all the screws hold the back cover and remove the cover.

    • Remove the speakers and the small circuit board in the bottom center (behind the LG logo.)

    • Remove the rectangular plate at the bottom center and carefully remove the 2 ribbon cables connected to the LCD display. Flip up the black retaining clip and gently pull out the cables using the clear plastic tab.

    • Flip the TV over, LCD side up.

    • Carefully remove the plastic bezel, gently bending the tabs that hold it the frame.

    • Remove the LCD panel. Caution!' The LCD panel is fragile and breaks easily. Slide a large cardboard sheet under the display and carefully support the panel's weight without any bending. (If it cracks, well, you now have a much more expensive repair problem.)

    • Be sure you have a stable surface large enough to hold the LCD panel.

    • Remove the small screws from the four metal frames around the outside of the TV. Be sure to remember each part's location and orientation.

    • Remove the plastic LCD support frame.

    • Remove the diffuser panels, taking care to remember their orientations. You can use a Sharpie pen to mark the lower left corner off all of the panels.

    • Flip the TV on the other side. Remove the LCD panel white plastic standoffs. Pinch the clips together and push the standoff out of the chassis.

  2. LG 47LN5400 LED  Replacement: stap 5, afbeelding 1 van 1
    • Flip the TV on its back again.

    • Remove the white plastic sheet that covers the LED strips.

  3. LG 47LN5400 LED  Replacement: stap 6, afbeelding 1 van 2 LG 47LN5400 LED  Replacement: stap 6, afbeelding 2 van 2
    • Follow the excellent troubleshooting instructions in the YouTube video:LG No Picture, Screen Flash 47LN5200 47LN5400 47LA6200 47LN5700 47LN5750 47LN5790

    • Take care to unplug the LED power connecter before you test with the power supply!

    • Once you have determined where the failed LEDs are, you have a choice:

    • Purchase the replacement LED strips needed; be sure to order the correct part number. Note there are several part numbers for the various strips.

    • Replace all of the LED strips.

    • Replace the individual LEDs, using the heat gun method shown in the video. This isn't as hard as it looks. But you'll need a steady hand and good vision to properly place the new LED(s).

    • Be sure to remove the two-sided tape from the LED strip before heating!

    • And, replace the removed tape with new double-sided tape.

  4. LG 47LN5400 LED  Replacement: stap 7, afbeelding 1 van 1
    • Once you have replaced the LED strips (or individual LEDs), test the backlight before you reassemble everything.

    • Plug the LED power connector back in.

    • Plug in the AC power cord. Do all the LEDs now light? If so, congratulations! If not, re-check the LEDs with the power supply.

Conclusie

To reassemble your device, follow these instructions in reverse order.

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Wayne Seltzer

Lid sinds: 11/09/10

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