LG HX966TZ Service Manual page 110

ELECTRICAL TROUBLESHOOTING GUIDE
3. SYSTEM PART
Power cord in
YES
"BOOT" display
on FLD OK?
YES
Power on.
YES
A
B
CN150
NO
VKK, FL-, +
check OK?
VFD_CLK
DO, STB
OK?
Check DIS301.
NO
P_sense
check OK?.
P_CTRL
check OK?
Replace of IC101
UPD78F1165.
2-97
NO
YES
NO
YES
NO
NO
YES
NO
YES
Check CN150
& SMPS board.
Check R104, R107, R108
vol. level.
Replace DIS301.
Check Noise cap.
& SMPS board.
Check R166 vol. level.