Read LG 32LN549E (CHASSIS:LA3AA) Service Manual online
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4. RGB Video
Check input signal format.
Is it supported?
Check RGB Cable
for damage or open conductor.
Check JK705
R/G/B signal Line
ok
ok
ok
No
Replace Jack
Check RGB_DET Signal
Replace R1732
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
5. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID Downlaod
ok
ok
ok
No
Replace the defective IC or re-download EDID data
Check HDMI Signal
Check other set
If no problem, check signal line
ok
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
Replace Main Board
No
Check HDMI_DET (HPD)
No
Replace HDMI1 R802, R805, Q801
HDMI2 R804, R805, Q802
HDMI3 R815, R817, Q804
Check HDMI I2C Signal
ok
No
Replace D801. D802
Check JK801, JK802,JK803
No
Replace Jack
ok
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