No Osd - LG 37LF2500 Service Manual

LCD TV
Symptom
P800 Pin #13, 14 = 12V
P800 Pin #17, 18 = 24V ?
NO
YES
P800 Pin #20
Voltage level = 2V
NO
YES
MAIN B'D L1300 = 12V ?
NO
YES
Check LVDS Cable
OK ?
YES
NO
Replace LVDS Cable

No OSD

Check Power connector
OK ?
YES
Replace MAIN B'D Q802
Replace MAIN B'D Q806
Replace Main Board
Making
Revision
Replace Power Board
2009. 2 . 1
3/34
26~42LH2000
32~47LH3000/LH4000