LG S92T2-C Service Manual page 63

ELECTRICAL TROUBLESHOOTING GUIDE
No 1.8 V (DSP VDD18) IC401 DSP
YES
Is the
VCC supplied to IC405
pin3?
YES
Check IC405 and replace.
No 5 V (SYSTEM VCC_5V)
YES
Is the
VCC supplied to IC153
pin2?
YES
Is there
signal at IC153
pin1?
YES
Check IC153 and replace.
NO
Check IC151 pin3 (VCC_3V3).
NO
Check 6 VA on SMPS board.
NO
Check IC101 pin68 (LDO_CTRL).
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