LG 42LE5400 - Set Video Play menu option

10. Trouble shooting - No video or Abnormal image (M+S block)
Check mini-LVDS FFC cable
Check VDD_LCM (16V)
and VCC_LCM (3.3V)
Check P-Gamma Data
Check IC9100
AVDD (R9112)
Check P-Gamma IC
I2C Line
Check PANEL_VCC
(IC9103)
No good
Check Q8004,Q803,Q8001
And PANEL_CTRL
No good
Replace IC9003
No good
OK
Check IC9003
(each pin, esp R9144, R9145,
R9156,R9157,R9166)
Replace
No good
OK
Check VGL (-5V)
Check IC9003
(each pin, esp R9129,R9130,R9131)
Check VGH (+25V)
No good
No good
Replace IC9003
No good
OK
OK
Check HVDD
Check IC9102
(each pin, esp R9126,R9127,R9128)
No good
Replace IC9102
No good
OK
No good
OK
Check output
data
OK
Replace P-Gamma IC
(IC9100)
No good
Check VDD_ODD/VDD_EVEN/
CLK1~6 & GCLK1~6
Check IC9101
(Each power)
No good
Replace IC9101
No good
OK
Check Module
Or LG5111/LGE7378A
OK
7.916.2-5.328N/A120HzEdge55
7.715.5-52829120HzEdge47
816.25-527.6929.15120HzEdge42
HVDDVDD_LCMVGLVGH (25
℃
)VGH (0
℃
)Module
Q Remark
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Only for training and service purposes
LGE Internal Use Only