LG BD630, Service Manual

Page: 48 / 109

3-33
ONE POINT REPAIR GUIDE
When you turn on your set, it will blank / no message or hello front panel, and it will not boot-
up.
3-3. IC204 (No 1.2 V)
3-3-1. Solution
Replace IC204 on main board.
3-3-2. How to troubleshoot (Countermeasure)
1) Please check 1.2 V of C241 on main board.
2) If 1.2 V voltage doesn’t come out, check IC207 pin 3(Vcc 3.3 V).
If there is no 3.3 V, please go to previous page for solution 3-1.
3) If Vcc input IC204, there is 3.3 V signal,
First, check C241, R241 and if there’s no defective component, please replace IC204.
4) After changing it, if the set is still not booting :
- Refer to the next page for checking another power source. (1.1V, 1.5V)
- 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.
3-3-3. Service hint (Any picture / Remark)
< Main board bottom view >
IC204