3.For 4440s/4441 models, disconnect the following cables from the system board:

(1)Function board/Power button board cable

(2)Finger print reader board cable

4.Position the computer upside down.

Component replacement procedures 69

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HP 4540s C6Z35UT#ABA, 14 C9K59UT#ABA, D8C11UT 14 D8C11UT#ABA manual