LG 75UM7570AUE Service Manual page 33

Standard Repair Process
Error
symptom
Check outlet
Check A/C cord
Check for all 2- phase
power out
Fix A/C cord & Outlet
and check each 2
phase out
B. Power error
Off when on, off while viewing, power auto on/off
N
Error?
Y
Established
date
Revised date
CPU
Abnormal
Abnormal
1
7
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Replace Main B/D
Normal?
N
Replace Power B/D
Y
End