Booting When You Turn The Unit On, No Message Or "Hello" On Front Panel - LG BP540N Service Manual

ONE POINT REPAIR GUIDE
3. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
"HELLO" ON FRONT PANEL
When you turn on your set, it will blank / no message or hello on front panel, and it will not boot-up.
3-1. IC153 (No 3.3 VA)
3-1-1. Solution
Replace IC153 on main board.
3-1-2. How to troubleshoot (Countermeasure)
1) Please check 5.1 VA of IC153 pin2 (Vin).
2) If 5.1 VA is abnormal, follow the stage 2-1 case1 at the previous page.
3) If 5.1 VA is OK, but 3.3 VA is abnormal at the IC153 pin1(Vout), replace IC153.
3-1-3. Service hint (Any picture / Remark)
IC153
< Main board top view >
3-30