Read LG 42SL80YD-AA (CHASSIS:LB91T) Service Manual online
Making
Revision
2009. 2 . 1
LCD TV
Symptom
No OSD
2/25
Check Power connector
OK ?
Replace Power Board
P800 Pin #13, 14 = 12V
P800 Pi #17 18 24V ?
Revision
P800 Pin #20
Voltage level = 2V ↑
OK ?
Replace Power Board
YES
NO
YES
NO
Replace MAIN B’D Q802
P800 Pin #17, 18 = 24V ?
NO
YES
MAIN B’D L810 = 12V ?
Replace MAIN B’D Q805
NO
YES
Replace Main Board
YES
Check LVDS Cable
OK ?
YES
NO
Replace LVDS Cable
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