Read LG 47LH9000 (CHASSIS:LD91I) Service Manual online
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P800 Pin #20
Voltage level = 2V
-
Check Power connector
OK ?
Replace Power Board
YES
NO
YES
P800 Pin #13, 14 = 12V
P800 Pin #17, 18 = 24V ?
NO
Replace Power Board
YES
NO
Replace MAIN B’D Q802
MAIN B’ D L3505 = 12V ?
Replace MAIN B’D Q806
YES
NO
MAIN B’ D C854 = 1.8V ?
Replace MAIN B’D IC807
YES
NO
MAIN B’ D C833 = 1.26V ?
Replace MAIN B’D IC802
YES
NO
Check MAIN B’D X900 Clock
12MHz
Replace MAIN B’D IC900
YES
NO
Replace MAIN B’D IC902
Serial FLASH
YES
Replace MAIN B’D
IC1000, IC1001 DDR2 Memory
NO
P800 Pin #13, 14 = 12V
P800 Pin #17, 18 = 24V ?
P3500~T-con LVDS Cable
OK ?
YES
Replace LVDS Cable
NO
Replace MAIN B'D IC900
NO
Check RF Cable
MAIN B’ D L821 = 5V ?
YES
MAIN B’ D L1202 = 3.3V ?
NO
Replace MAIN B’ D IC809
YES
NO
Replace MAIN B’ D IC808
MAIN B’ D C810
Pin #2 = 1.2V ?
Replace MAIN B’ D IC804
YES
NO
YES
Replace MAIN B’ D IC 100
2. No OSD
3. Digital TV Video Problem
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