Check Power connector
OK ? Replace Power Board
NO YES
Replace Power Board
NO
Replace MAIN B’D IC801
NO
Replace MAIN B’D IC805
NO
Replace MAIN B’D IC806
NO
Replace MAIN B’D IC100
NO
Replace MAIN B’D IC103
Serial Flash
NO Replace MAIN B’D
IC300, IC301 DDR2 Memory
NO Replace MAIN B’D IC100
NO

Making

Revision

2009. 2 . 1
LCD TV Symptom Power-Up Boot Fail

19~22LH2000

2/34

P801 Pin #5~#6
Voltage Level = 5V ?
YES
P801 Pin #1, 2 = 15V?
MAIN B’D L803 = 3.3V ?
YES
MAIN B’D L813 = 1.26V ?
YES
MAIN B’D L805 = 3.3V ?
YES
Check MAIN B’D X100 Clock
12MHz
YES
Replace MAIN B’D IC102
NAND FLASH
YES
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