LG S92T2-C Service Manual page 44

When you turn on your set, it will blank / no message or Welcome on front panel, and it will not boot-up.
2-3. IC150 (NO 1.5 V)
2-3-1. Solution
Replace IC150 on MAIN board.
2-3-2. How to troubleshoot (Countermeasure)
1) Please check 1.5 V of IC150 on MAIN board.
2) If 1.5 V voltage doesn't come out,
- Check IC150 pin13 (VCC 14 VA).
If there is no 14 VA, please check 14 VA from SMPS.
3) If VCC input IC150 there are 14 VA signal,
First of all, check the pin15 is high and if it's high, check R1F4, R1F5, R1F9, R1G4, C1G7, L1E0
and if there's no defective component, please replace IC150.
4) After changing it, if the set is still not booting:
- Check 1.2 V / 3.3 V is normal. (please refer to other sections of this guide)
- Check crystal X501 refer to item 2-5.
- Check NAND flash IC (IC504) refer to item 2-6.
- Check DDR IC (IC502, IC503) refer to item 2-7.
- Check MT8560 IC (IC501) refer to item 2-8.
2-3-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< MAIN board top view >
2-31
IC150