LG 42PG20-UA (CHASSIS:PU84A) Service Manual ▷ View online
- 11 -
TROUBLE SHOOTING GUIDE
- 12 -
TROUBLE SHOOTING GUIDE
Power-Up Boot Fail Trouble Shooting
Check P701 All
Voltage Level (16V, 5V)
Check Power connector
OK ?
Replace Power board
Y
N
Y
Check IC706 #2 Pin
Voltage Level 2.6V
Replace IC706 &
Recheck
Y
N
Check X100 Clock
12MHz
Replace 100
Y
N
Replace IC105 Flash Memory
Check Q706 Output
Voltage Level (5V)
Replace Q801
N
Y
- 13 -
TROUBLE SHOOTING GUIDE
- 14 -
TROUBLE SHOOTING GUIDE
No OSD Trouble Shooting
Check P302
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Maybe Mstar has problems
Check LVDS Cable
Check PDP Module
Control board
Refer to Module CAS
Y
N
Y
Replace Cable
N
Y
Check PDP Vs,Va Voltage
Module 5V
Replace Power
N
Check P701 Disp_EN,
VaVs ON, 5V_MNT
Check GPIO Path
N
Y
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