LG NP8540 Service Manual page 31

IF NOT BOOTING WHEN YOU TURN ON THE SET.
3-4. IC501 (MPEG IC)
3-4-1. Solution
Replace IC501 on main board.
3-4-2. How to troubleshoot (Countermeasure)
1) Check physical status of IC501 on your eyes.
2) Check 1.2 V of L910, If 1.2 V is abnormal, follow the stage 3-1-2 at the previous page.
3) Check 1.5 V of L909, If 1.5 V is abnormal, follow the stage 3-1-2 at the previous page.
4) Check 3.3 V of L911, If 3.3 V is abnormal, follow the stage 3-2 at the previous page.
5) When you followed above step but it doesn't work, replace the IC501.
3-4-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC501 IC501
< Main board top view >
3-8