Read LG 26LG3DDH (CHASSIS:LA96D) Service Manual online
1. Power-up boot check
Check standby Voltage
P1408 9pin : +3.5V_ST
→
NO
Check Power connector
→
OK
Check Fuse
→
OK
Replace Power board
↓ OK
Check DC-DC output
IC3000 Pin 6: +5V_ST_PTC
→
NO
Replace IC3000
↓ OK
Check Q404 Output
Pin 8: +5V_ST
→
NO
Re-download PTC S/W
↓ OK
Check X100 clock
→
NO
Replace X100
↓ OK
Check P1408 OR_RELAY_ON
1Pin : 3.5V
→
NO
Re-download software& PTC
→
OK
Replace Mstar(IC100)
or Main board
↓ OK
Check Multi Voltage
P1408 17pin : 12V,
2pin : 24V
→
NO
Replace Power board
↓ OK
Check Q706 Output.
12V, 5V
→
NO
Replace Q706
↓ OK
Check inverter control & error
P1408 18pin : Low
P1408 20pin : high
→
NO
Check Power board
or Module
↓ OK
Check Mstar LVDS output
R847,R848….R856
→
NO
Replace Mstar(IC100)
or Main board
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