Trouble Shooting Guide - LG UltraFine 27MD5KA Service Manual

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1. No Video – Thunderbolt3
Check input signal format
Is it supported?
Y
Check Thunderbolt3 Cable for
Damage or Open Connector
Y
Check JK101 for proper
connection or Damage
Y
Check connection for
Thunderbolt3 in Source
Y
Check IC500

TROUBLE SHOOTING GUIDE

N
Replace Connector
N
Check IC200
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