LG S65T1-S Service Manual page 49

When you turn on your set, it will display "WELCOME" on front panel, and it will not boot-up normally.
2-6. IC502 (DDR3 MEMORY)
2-6-1. Solution
Replace IC502 on MAIN board.
2-6-2. How to troubleshoot (Countermeasure)
1) Please check 0.75 V of DDR3_VREF. (between C5C2 and R5C3)
Please check 1.5 V of IC502.
2) If it doesn't work even though IC151, IC156 are no problem,
IC502 (DDR memory) could have problem.
3) After changing it, if the set is still not booting :
- Check MT8563 IC (IC501) refer to item 2-7.
2-6-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC502 IC502
< MAIN board top view >
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