Booting When You Turn The Unit On, No Message Or "Welcome" On Front Panel - LG S94T1-S Service Manual

ONE POINT REPAIR GUIDE
2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
"WELCOME" ON FRONT PANEL
When you turn on your set, it will blank / no message on front panel, and stand-by led no working.
2-1. IC100 (No 3.8 VA & 3.3 VA)
2-1-1. Solution
Replace IC100 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.8 VA of IC100.
2) If 3.8 VA is abnormal, please check SMPS 3.8 VA and D101 diode.
3) If 3.8 VA is OK, but 3.3 VA is abnormal, replace D101 diode.
4) If 3.8 VA, 3.3 VA is OK, check X100 crystal signal.
2-1-3. Service hint (Any picture / Remark)
X100
IC100
< MAIN board top view >
D101
< MAIN board bottom view >
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