LG UltraFine 22MD4KB Service Manual page 21

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2. Inspection method about Repaired set
Type
 Since it is USB C-type model, no other input is
available.
Issue
- For repair result check-up, USB A to C Cable Jig
is Needed.
 Cable Window PC : picture, voice, Interface
- USB A to C Cable , USB C to C Cable
- Testing is possible by installing pattern program in
Windows PC
USB-C to C Cable Or USB-A to C Cable
Check Guide
After Repair
P/N : EAD63932601
(USB C to C Cable)
22MD4KA
P/N : EAD63809902
(USB A to C Cable)
 Since it is Thunderbolt3 exclusive model, no other input is available.
- For repair result check-up, Thunderbolt3 Host equipment is needed.
(Picture and Sound, Camera Function can be checked tru Mac PC)
 Switch embedded to the Main Board : Picture Testing is possible
- Function : Press 1 time. WRGB Rolling Pattern is automatically
displayed.
- Disable : Press the Switch again one more time or AC Power off/on
Main Board
<Switch Button>
Copyright ⓒ 2016 - 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
27MD5KA

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