LG 47LA790V Service Manual page 86

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
D. Function error
11
12 E. Noise
13 F. Exterior error
14 G. Network 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
Tuning fail, 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 & Local switch checking
External device recognition error
Circuit noise, mechanical noise
Exterior defect
Exterior defect
34 / 90
Page Remarks
37
38
39, 40
41
42
43
44
45
46
47
48
49
50
51, 52
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