LG LFXS28566 Series Technical Manual page 124

SVC Guide for Wi-Fi is Turned Off
Bulletin Type: SVC Notice
Applicable for Serial Number: Since issued of SVC bulletin, All models in the List
Applicable for models:
17Y FHD: LJ55 Series, 43", 49", 55"
17Y UHD: UJ63 Series 49", 55", 60", 65" (43" excepted)
UJ65 Series 49", 55", 60", 65", 70" / UJ64 75"
UJ77 Series 49", 55", 60", 65"
SJ80 55", 65" / SJ85 65"
① Wi-Fi network disconnect
(refer to Picture)
How to check the detailed symptoms
c-1) Network Menu: Network Off  Ⓐ
c-2) Output NG on Wi-Fi MAC / Speed
Symptoms
in In-start menu Ⓑ
② Pop-up Message is shown on the screen as
"unknown device is connected/disconnected"
Faulty FFC cable for connecting Wi-Fi module and
Cause
main board
1. Repair Instruction:
Change the FFC cable
Service Bulletin
Parts Others

(LJ/UJ/SJ/LK/UK/SK series)
Applicable only with symptoms
18Y FHD: LK54 Series 32",43"
LK57 Series, 43", 49"
18Y UHD: UK60,61,62,63,65,Series, 43",49",50",55",65",70",75"
SK80 Series, 55", 65"
C-1)
Ⓐ
Picture
C-2)
Ⓑ
Page 1
Product: TV
Bulletin #:
GLZ201900187-01
Release Date: 2019-11-05
with every repair

Normal NG
MENU: Settings  Network  Wi-Fi menu