LG 27UL850 Service Manual page 15

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Only for training and service purposes
4. No Video-DP
Check signal format and
resolution
Is it supported?
Y
Check DP Cable for Damage
or Open Connector
Y
Check JK801 for proper
connection or Damage
Y
Check AUX Signal
(R137 or R142)
Y
Replace Main Scaler (IC200)
N
Replace Connector
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LGE Internal Use Only