LG BPM54N Service Manual page 51

ONE POINT REPAIR GUIDE
When you turn on your set, it will display "HELLO" on front panel, and it will not boot-up normally.
3-9. Main board
3-9-1. Solution
Replace main board.
3-9-2. How to troubleshoot (Countermeasure)
1) Please remove IC501 and IC601, IC602, and then check the Impedance between each signal
(DATA, ADDRESS and so on.)
2) If there is some Impedance (a few ohm or infinite ohm) especially power source trace,
PCB via might be broken. You'd better change main board.
3-9-3. Service hint (Any picture / Remark)
IC601
IC501
IC602
< Main board top view >
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