LG BD630N Service Manual page 47

When you turn on your set, it will blank / no message or hello front panel, and it will not boot-
up.
3-2. IC207 (No 3.3 V)
3-2-1. Solution
Replace IC207 on main board.
3-2-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 V of L207 on main board.
2) If 3.3 V voltage doesn't come out, check IC207 pin 2(Vcc 5.1 VA).
When you figure out those power, if there is no 5.1 VA, please check 5.1 VA from SMPS.
For the solution please back to the solution 2.
3) If 5.1 VA input is normal, first of all check the PWR_CTL is high(CN201 pin 6).
If PWR_CTL is high, check R208, L207, C207, R217, R238, R239, R240 and if there's no defective
component then replace IC207.
4) After changing it, if the set is still not booting :
- Refer to the next page for checking another power source. (1.1 V, 1.2 V, 1.5 V)
- Check crystal X501 refer to item 3-6.
- Check NAND flash IC(IC603) refer to item 3-7.
- Check DDR IC(IC601 ~ IC602) refer to item 3-8.
- Check MT8550L IC(IC501) refer to item 3-9.
3-2-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< Main board bottom view >
3-32
IC207