System Part - LG LAB550H Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. SYSTEM PART

Power On
YES
Stand-by LED
OK?
YES
3A
3B
NO
PVDD OK?
3.3 VA OK?
Replace IC101 Micom.
3.3 VA OK?
2-46
NO
YES
NO
YES
NO
Check SMPS board.
Check IC152.
Main Board
Check CN1F1 pin3.
Front Board