LG LS-P0960HL - Electronic Parts Troubleshooting; Unit Power Failure Diagnosis

Electronic Parts Trouble Shooting Guide
: The unit does not operate
Possible Trouble 1
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YES
YES
YES
NO
YES
Is the trans input power
AC240V?
Is the trans output power
about AC14V?
Is output voltage of IC2
DC12V?
Check the fuse, check
the wiring diagram.
Is output voltage of
IC3 DC5V?
Is the reset circuit
all right?
Exchange Main P.C.B ASM
YES
NO
Check the main P.C.B
patten.
NO
Exchange IC2
NO
Exchange IC 3
NO
Check and exchange IC4
YES
Exchange the trans.
Is shorted the
trans output?
NO