LG BD390 Service Manual page 67

COMPONENT REPAIR GUIDE
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.
5-4. X504
5-4-1. Solution
Replace X504 on main board.
5-4-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of 27Mhz crystal (X504)
2) Please check the frequency of 27Mhz crystal (X504)
3) If the crystal doesn't oscillate, replace X504.
4) After changing it, if the set is still not booting, check MPEG IC(IC201). Refer to item 5-7.
5-4-3. Service hint (Any picture / Remark)
< Main board top view >
X504
< Main board bottom view >
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