Booting When You Turn The Unit On, No Message On Front Panel - LG S65T1-W Service Manual

2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE 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. IC155 (No 3.3 VA)
2-1-1. Solution
Replace IC155 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 VA of IC101.
2) If 3.3 VA is abnormal, please check 5.5 VA of IC155 pin1.
3) If 5.5 VA is OK, but 3.3 VA is abnormal, replace IC155.
2-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< MAIN board bottom view >
< MAIN board bottom view >
2-29
IC101 IC101
IC155 IC155