LG BPM54N Service Manual page 50

When you turn on your set, it will display "HELLO" on front panel, and it will not boot-up normally.
3-8. IC501 (MPEG IC)
3-8-1. Solution
Replace IC501 on main board.
3-8-2. How to troubleshoot (Countermeasure)
1) Please check 1.2 V of C502 on main board.
Please check 3.3 V of C553 on main board.
Please check 1.5 V of C602 on main board.
2) If it doesn't work even though IC150, IC151 are no problem,
IC501 MT8560 could have problem.
3) After changing it, if the set is still no booting, check main board refer to item 3-9.
3-8-3. Service hint (Any picture / Remark)
C602(1.5V)
ONE POINT REPAIR GUIDE
< Main board bottom view >
IC501
< Main board top view >
3-37
C502(1.2V) C553(3.3V)