LG 49UF6700 - AV Video No Signal

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LGE Internal Use Only
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Only for training and service purposes
4. AV Video No signal
Check input signal format. Is it supported?
OK
Check AV cable
OK
Check AV Jack CVBS signal ZD2802
Replace AV Jack JK2802
Replace IC101 or Main Board
OK
Check CVBS signal ZD2802, ZD2803, R2859, R246, C238
NG
Replace ZD2802, ZD2803, R2859, R246, C238
OK
NG