LG NP8540 Service Manual page 29

IF NOT BOOTING WHEN YOU TURN ON THE SET.
3-2. IC900 (NO 3.3 V)
3-2-1. Solution
Replace IC900 on main board.
3-2-2. How to troubleshoot (Countermeasure)
1) Please check 18 VA of IC900 Pin2(VIN).
2) If 18 VA is abnormal, follow the stage 1-1-2 at the previous page.
3) If 18 VA is OK, but 3.3 V is abnormal at the IC900(Pin7) replace IC900.
4) When you followed above step but it doesn't work, check the around parts. (L900, C901, C904, C955,
C956, C957, R941, R906, R929, C934, R930, R934, R938, R939, C920, C954, C925)
3-2-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC900 IC900
< Main board top view >
3-6