LG S94T1-S Service Manual page 47

When you turn on your set, it will blank / no message or Welcome on front panel, and it will not boot-up.
2-4. IC150 (No 1.2 V)
2-4-1. Solution
Replace IC150 on MAIN board.
2-4-2. How to troubleshoot (Countermeasure)
1) Please check 1.2 V of IC150 on MAIN board.
2) If 1.2 V voltage doesn't come out,
- Check IC150 pin8 (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 pin6 is high and if it's high, check resister value
and if there's no defective component please replace IC150.
4) After changing it, if the set is still not booting:
- Check 1.5 V / 3.3 V is normal. (please refer to other sections of this guide)
- Check crystal X501 refer to item 2-6.
- Check eMMC flash IC (IC506) refer to item 2-7.
- Check DDR IC (IC503, IC504, IC505) refer to item 2-8.
- Check MT8580 IC (IC501) refer to item 2-9.
2-4-3. Service hint (Any picture / Remark)
IC150
ONE POINT REPAIR GUIDE
< MAIN board top view >
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