No Booting - LG LAB550H Service Manual

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2. NO BOOTING

When you turn on your set, it will blank / no message on front panel, and stand-by led no working.

2-1. IC152 (NO 3.3 VA)

2-1-1. Solution

Replace IC152 on MAIN board.

2-1-2. How to troubleshoot (Countermeasure)

1) Please Check 3.3 VA of IC101.

2) If 3.3 VA is abnormal, please check 12 VA of L187.

3) If 12 VA is OK, but 3.3 VA is abnormal, replace IC152.

2-1-3. Service hint (Any picture / Remark)

IC101

ONE POINT REPAIR GUIDE

< MAIN board top view >

< MAIN board bottom view >

2-29

L187

IC152

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