32LV3300-TG (CHASSIS:LB01M) - LG TV Service Manual (repair manual). Page 14

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1. Power-up boot check
TROUBLESHOOTING
Check stand-by Voltage.
P403 9~12pin : +3.5V_ST
Check Power connector.
Main B/D 3.5V Line
Short Check
Check X201 clock.
24 MHz
Replace X201.
Check P403 PWR_ON.
1pin : 3.3V
Replace Mstar(IC101) or Main board.
Check Multi Voltage.
P403 2pin:24V,  17pin:12V
Replace Power Board.
Check Inverter Control & Error Out.  
P403 18 pin : High
P403 24 pin : low
Check Power Board or Module.
Check IC402/3/7 Output Voltage.
IC402 : 2.5V
IC403 : 1.1V
IC407 : 1.5V
Q403 : 3.3V
Replace IC402/3/7, Q403.
Re-download software.
Check Micom Voltage.
L404 : +3.5V
Replace L404.
Check LVDS Power Voltag e.
Q409 : 12V
Replace Q409.
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
Change Module.
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
No
No
ok
Replace Power board.
ok

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