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Copyright © 2020 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
1.
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO”
ON FRONT PANEL
When you turn on your set, no message on the front panel.
1-1. IC604 System 12 VA in AMP Board (No 12 VA)
1-1-1. Solution
Replace AMP board.
1-1-2. How to troubleshoot (Countermeasure)
1) Please check 25 VA of IC604 pin2 (VIN).
2) If 25 VA is abnormal, please check AC adapter.
3) If 25 VA is OK, but 12 VA is abnormal at pin3 L611 of IC604 (VOUT), IC604 block has problem.
1-1-3. Service hint (Any picture / Remark)
< AMP board top view >
IC604
L611
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