Read LG 22LG3DCH (CHASSIS:LA76A) Service Manual online
1. Power-Up Boot Fail
2. No OSD
- 12 -
TROUBLE SHOOTING
Check P1201 All
Voltage Level (5V, 12V, 16V)
Check Power connector
OK ?
Replace Power board
N
Y
Check Q706 OUT
Voltage Level 3.3V
Replace Q706
Recheck
Y
N
Check
IC706(3.3V),IC705(3.3V),IC709(2.6),
IC710(1.25V) OUTVoltage
Level
Replace
IC706,IC705,IC709,IC710
Recheck
N
Y
Check X100 Clock
12MHz
Replace X100
Y
N
Replace IC105 Flash Memory
N
N
Redownload or replace
Flash Memory IC105
Y
Check P1201
Voltage Level ST5V
Check
Power connector
Replace Power board
Check LVDS Cable
Check LCD Module
Control board
Y
N
Y
Y
Check Q706 OUT
Voltage Level 3.3V
Replace Q706
Y
N
Replace Cable
N
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