LG LB45 Series - No Power; Trouble Shooting

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Only for training and service purposes
TROUBLE SHOOTING
1. No Power
Check C400
Voltage Level. (19V)
Check IC401 Output
Voltage Level. (3.3V)
Check X100 Clock
24MHz.
Check IC402 Output
Voltage Level. (1.15V)
Check IC403 Output
Voltage Level. (5V)
Replace IC102 Flash Memory.
Check Power connector
OK?
Replace IC401 & Recheck.
Replace X100.
Replace IC402 & Recheck.
Replace IC403 & Recheck.
Replace Adapter.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes