LG OLED77Z19LA Service Manual page 54

Appendix. Examples of Symptoms(Module)
Symptom
Item
Name
MODULE Vertical bar
MODULE Image broken
MODULE White dot
MODULE Line dim
Cause
Un-repairable cases
In this case please exchange the module
Source-driver issue
White dot cause by panel issue
Vertical line cause by source-driver IC
A - 6/10
Check parts by symptom
Symptom Image
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