LG 39LY340H Service Manual page 17

5. HDMI Video
Check input signal format.
Is it supported?
ok
Check HDMI Cable conductors
for damage or open conductor.
ok
Check EDID Downlaod
ok
Check JK,800, JK801
ok
Check HDMI I2C Signal
ok
Check HDMI_DET (HPD)
ok
Check HDMI Signal
ok
Check Mstar LVDS Output
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Only for training and service purposes
No
Replace the defective IC or re-download EDID data
No
Replace Jack
No
Replace D800. D801
No
Replace HDMI1 R802, R805, Q800
HDMI2 R812, R813, R814
No
Check other set
If no problem, check signal line
No
Replace Mstar(IC101) or Main Board.
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No
Replace Main Board
LGE Internal Use Only