The Problem may be Logic part
LGE Internal Use Only
START
Check TP1
Is it 19.2MHz?
No
Replace X4100 and then
check TP1
Is it 19.2MHz?
No
Refer to Logic trouble shoot
Yes
XO Circuit is OK. Check next step
Yes
XO Circuit is OK. Check next step
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3. TROUBLE SHOOTING
Only for training and service purposes