LG BPM55 Service Manual page 55

ELECTRICAL TROUBLESHOOTING GUIDE
No 1.5 V
YES
Is the
3.3 V supplied to IC152
pin3?
YES
Check IC150 and replace.
No 1.2 V
YES
Is the
Vcc 12 VA supplied to IC150
pin13?
YES
Is there
3.3 V at IC150
pin15?
YES
Check IC150 and replace.
NO
Check 3.3 V on IC151 pin3.
NO
Check 12 VA on JK806.
NO
Check PWR_CTL signal from IC501.
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