LG FH2 Service Manual page 28

ELECTRICAL TROUBLESHOOTING GUIDE
SYSTEM POWER SUPPLY ON SMPS BOARD
AC TO DC abnormal?
Is F2 normal?
Is BD1 normal?
Is Q3 normal?
Is IC2 normal?
Is D3 normal?
Power line of MAIN PCB is short.
A
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
3-11
Replace F2.
Replace BD1.
Replace Q3.
Replace IC2.
Replace D3.