LG NP8340, Service Manual

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3-8
ONE POINT REPAIR GUIDE
7. IF NOT BOOTING WHEN YOU TURN ON THE SET.
7-1. IC103 (NO 3.3 VA)
7-1-1. Solution
Replace IC103 on MAIN board.
7-1-2. How to troubleshoot (Countermeasure)
1) Check 3.3 VA of IC103 Pin48 (VIN).
2) If 3.3 VA is abnormal, follow the stage 5-1 at the previous page.
3) If 3.3 VA of IC103 Pin48 (VIN) is OK, check the EEP_CLK (Pin1), EEP_DAT (Pin2) signal.
If signal is abnormal change the IC103.
4) If the EEP_CLK (Pin1), EEP_DAT (Pin2) signals are OK, check the IC100 Pin8(VCC / 3.3 VA).
If Pin8 (VCC / 3.3 VA) is OK, change the IC100.
7-1-3. Service hint (Any picture / Remark)
< Main board bottom view > < Main board top view >
IC103 IC103 IC100 IC100