LG 42GA6400-UD Service Manual page 79

Contents of LCD TV Standard Repair Process
No. Error symptom (High category)
1
2
3
A. Video error
4
5
6
B. Power error
7
8
C. Audio error
9
10
11
D. Function error
12
13
14 E. Noise
15 F. Exterior error
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
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Only for training and service purposes
Error symptom (Mid category)
No video/Normal audio
No video/No audio
Picture broken/ Freezing
Color error
Vertical/Horizontal bar, residual image, light
spot, external device color error
No power
Off when on, off while viewing, power auto
on/off
No audio/Normal video
Wrecked audio/discontinuation/noise
Remote control & Soft Touch Key checking
Qwerty Remote Motion operating checking
Wi-Fi operating checking
External device recognition error
Circuit noise, mechanical noise
Exterior defect
33
Page Remarks
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41
42
43
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