LG S92T2-C Service Manual page 48

When you turn on your set, it will display "WELCOME" on front panel, and it will not boot-up normally.
2-7. IC502, IC503 (DDR3 MEMORY)
2-7-1. Solution
Replace IC502, IC503 on MAIN board.
2-7-2. How to troubleshoot (Countermeasure)
1) Please check 0.75 V of DDR3_VREF. (between C545 and C546).
Please check 0.75 V of DDR3_VREF. (between C547 and C548).
Please check 1.5 V of IC502, IC503.
2) If it doesn't work even though IC150, IC151, IC155 are no problem,
IC502, IC503 (DDR memory) could have problem.
3) After changing it, if the set is still not booting:
- Check MT8560 IC (IC501) refer to item 2-8.
- Check MAIN board refer to item 2-9.
2-7-3. Service hint (Any picture / Remark)
C546
C545
C548
ONE POINT REPAIR GUIDE
< MAIN board bottom view >
C547
< MAIN board top view >
2-35
IC501
IC502
IC503