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Filming Requests

If you want, I can produce: a) a annotated test-point table for the most critical rails (requires a specific board revision), or b) step-by-step solder/reflow profiles for common regulator ICs on the 4520s — tell me which. hp probook 4520s boardview

Do you need help on the 4520s board?

Wi‑Fi issues

Searching LCD_EN shows it originates from pin 92 of the EC (KB926). Without the boardview, you’d never find that tiny via under the keyboard connector.

POST but no display

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Hp Probook 4520s Boardview [2021] Jun 2026

If you want, I can produce: a) a annotated test-point table for the most critical rails (requires a specific board revision), or b) step-by-step solder/reflow profiles for common regulator ICs on the 4520s — tell me which.

Do you need help on the 4520s board?

Wi‑Fi issues

Searching LCD_EN shows it originates from pin 92 of the EC (KB926). Without the boardview, you’d never find that tiny via under the keyboard connector.

POST but no display