LG BD390 Service Manual page 64

5. NO BOOTING WHEN YOU TURN THE UNIT ON. (BD390)
When you turn on your BD-P, it will display "Hello" or "Please wait" message continuously on
front panel, and it will not boot-up normally.
5-1. IC706
5-1-1. Solution
Replace IC706 on main board.
5-1-2. How to troubleshoot (Countermeasure)
1) Please check 1.2V of CA723.
2) If 1.2V voltage doesn't come out, check P_CON_5.3V of JIG910(front board).
--> If you figure out those power control doesn't come out any signal level (or voltage),
please replace IC901 of front board.
3) If P_CON_5.3V comes out 5V signal,
first, check the C704,R710, R705, R708(bottom of main) and then replace IC706.
4) After changing it, if the set is still not booting, check MPEG IC(IC201). Refer to item 5-7.
5-1-3. Service hint (Any picture / Remark)
IC706
< Main board top view >
COMPONENT REPAIR GUIDE
JIG910
< Front board bottom view >
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