Read LG 47LH30 (CHASSIS:LA92A) Service Manual online
LG Electronics. Inc. All right reserved.
C
2009
- 17 -
1. Power-up boot check
TROUBLESHOOTING
Check standby Voltage
P700 8pin : +5V_ST
NO
Check Power connector
and AC S/W on?
OK
Check Fuse
OK
Replace Power board
OK
Check X100 clock
NO
Replace X100
OK
Check P700 PWR_ON
2Pin : 5V
NO
Re-download software
OK
Replace Mstar(IC100)
or Main board
OK
Check Multi Voltage
P700 13pin : 12V,
18pin : 24V
NO
Replace Power board
OK
Check Q706 Output.
12V, 5V
NO
Replace Q706
OK
Check inverter control & error
P700 22pin : Low
P700 20pin : high
NO
Check Power board
or Module
OK
Check Mstar LVDS output
R812,R813 .R821
NO
Replace Mstar(IC100)
or Main board
2. Component Video
Check input signal format.
Is it supported?
OK
Check Component Cable.
OK
Check JK1200
NO
Replace Jack.
OK
Check Mstar LVDS output
NO
Replace Mstar(IC100)
or Main board
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