LG 75NANO90UNA Service Manual page 47

Contents of Standard Repair Process Detail Technical Manual
No. Error symptom
9
10
B. Power error_ No power
11
B. Power error_Off
12
(when on/off, while viewing)
13
C. Audio error_ No audio/Normal
video
14
15
D. Function error
16
17
18
E. Etc
19
20
Content
Check front display LED
Check power input Voltage & ST-BY 3.5V
Error check by LED Indicator
POWER OFF MODE checking method
Checking method in menu when there is no audio
Voltage and speaker checking method when there is
no audio
Remote control operation checking method
Magic Remote/WiFi operation checking method
How to use the Service remote control
Check items after Main B/D replacement
Adjustment Test pattern – ADJ Key
Main Board JIG Point
Continued from previous page
Page Remarks
A8
A9
A10
A11
A12
A13
A14
A15
A16-A18
A19
A20
A21
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