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1. Power-Up boot fail
Check P701 All
Voltage Level (16V, 5V)
Y
Check Q706 Output
Voltage Level (5V)
Y
Check IC706 #2 Pin
Voltage Level 2.6V
Y
Check X100 Clock
12MHz
Y
Replace IC105 Flash Memory
2. No OSD
Check P701 Disp_EN,
VaVs ON, 5V_MNT
Y
Check
SMPS
Vs,Va, 5V
Y
Check P302
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Y
Check LVDS Cable
for damage or
open conductors.
N
Check LCD Module
Control board
Refer to Module CAS
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLESHOOTING
Check Power connector
N
OK ?
N
Replace Q801
Replace IC706 &
N
Recheck
N
Replace X100
N
Check GPIO Path
N
Replace Power
N
Maybe Mstar has problems
Y
Replace Cable
- 16 -
Y
Replace Power board
LGE Internal Use Only
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