LG LAB550H Service Manual page 57

ELECTRICAL TROUBLESHOOTING GUIDE
No M_9.5VA (9.5 VA)
YES
Is the
VCC supplied to IC302
pin3?
YES
Check IC302 and replace.
No 5 VA
YES
Is the
VCC supplied to IC151
pin3?
YES
Check IC151 and replace.
No 5 V, 5V_LOADER
YES
Is the
VCC supplied to IC156
pin1?
YES
Is there
signal at IC156
pin3?
YES
Check IC156 and replace.
NO
NO
NO
NO
Check IC101 pin24 (P_CTRL1).
2-44
Check 12 VA.
Check 12 VA.
Check 5 VA.