LG 75UM7570AUE Service Manual page 54

Appendix. Examples of Symptoms(Main)
Symptom
Item
Name
Main Screen noise
Main Screen noise
Main Dark picture
Main Broken picture
Cause
Bit noise from horizontal screen
Broken screen due to
Main IC problem
Dark left-side screen
Top/bottom screen part
Picture problem due to tuner
Inner side quality problem
A - 3/11
Check parts by symptom
Symptom Image
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