LG Electronics 42LT760H-ZA 7. RGB-PC Video Trouble Shooting guide

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7. RGB-PC Video Trouble Shooting guide
Check input signal format.
Is it supported?
This board has big problem because Main chip (MTK) have some troubles.
After checking thoroughly all path once again, You should decide to replace MTK or not.
Check JK3603
Can you see the normal waveform?
Check AC cable for damage
For damage or open conductor.
Check the input of MTK(IC105).
Measure waveform at R323, R324 because it’s more easy to check.
Can you see the normal waveform?
Replace JK3603.
N
Y
Y
Y
Y