Trouble Shooting - No Video (Hdmi) - LG 42LE5400 Service Manual

7. Trouble shooting - No video (HDMI)

Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check HDMI Switch
IC8300 video Signal and I2C line
Check JK8300 / 1 / 2 / 3
Check HDMI_DET(HPD)
Check HDMI Signal output
of HDMI Switch (IC8300)
Check FRC and BCM LVDS Output
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Only for training and service purposes
ok
ok
No
ok
No
Replace Jack
ok
No
Replace R8300.R8302, R8301,R8316
ok
Check resister R8329 ~ R8334
No
If no problem, check signal line
ok
Replace Mstar(IC9001) or BCM( IC900)
No
or Main Board.
Check L8300(+3.3V) , Q200 (+1.8V)
No
Replace Coil or FET
OK
Replace the defective IC.
No
Replace BCM( IC900) or Main Board
LGE Internal Use Only