Read LG 47LH40 (CHASSIS:LA92G) Service Manual online
C
2009
- 19 -
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
12MHz
NO
Replace X100
OK
Check P700 PWR_ON
2Pin : 5V
NO
Re-download software
OK
Replace Mstar(IC100)
or Main board
OK
Check Q706 Output Level
5V
NO
Replace Q706
OK
Check Multi Voltage
P700 13pin : 12V,
18pin : 20V
NO
Replace Power board
OK
Check inverter control & error
P700 22pin : Low
P700 20pin : high
NO
Check Power board
or Module
OK
Check IC704 output voltage
3.3V
NO
Replace IC704
OK
Check Mstar LVDS output
R1109, R1110, R1111, R1120
NO
Replace Mstar(IC100)
or Main board
OK
Check URSA2 mini-LVDS output
P1400, P1401
NO
Replace Mstar(IC700)
or Main board
OK
Check
P1400, P1401
NO
Replace Mstar(IC700)
or Main board
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