LG BPM55 Service Manual page 50

Network 3d blu-ray disc / dvd player
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NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor,
and it will not boot-up.
3-9. Main board
3-9-1. Solution
Replace main board.
3-9-2. How to troubleshoot (Countermeasure)
1) Please remove IC501 and IC601.
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)
ONE POINT REPAIR GUIDE
IC501
IC501 and IC601
< Main board top view >
IC601
3-37

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Bp155Bp255Bpm25Bp550Bp350Bpm35

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