LG HX966TZ Service Manual page 97

When you turn on your set, it will blank / no message or "PLEASE WAIT" display on front panel,
and it will not boot-up.
3-4. IC151 (NO 1.5 V)
3-4-1. Solution
Replace IC151 on MAIN board.
3-4-2. How to troubleshoot (Countermeasure)
1) Please check 1.5 V of C1A7 on MAIN board.
2) If 1.5V voltage doesn't come out,
- Check IC151 pin2 (Vcc 14 VA).
If there is no 14 VA, please check PWR_CTRL(IC101 pin59) and 14 VA from SMPS.
(go to previous page to check it)
3) If V input pin2 of IC151 is 14 VA signal,
first of all check the 1.5 V_CTRL is high (IC101 pin59) and if it's high,
check R145, R1A7, L150, R1A2, R1A4, R1A8 and if there's no defective component,
please replace IC151.
4) If PWR_CTRL or 1.5 V_CTRL isn't high, you may need to replace IC101.
5) After changing it, if the set is still not booting:
- Check 1.2 / 3.3 V is normal. (please refer to other sections of this guide)
- Check crystal X500 refer to item 3-5.
- Check NAND flash IC (IC506) refer to item 3-6.
- Check DDR IC (IC502, IC503) refer to item 3-7.
- Check BCM7633 IC (IC500) refer to item 3-8.
3-4-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< MAIN board top view >
2-84
IC151
C1A7
L150