HP ProBook 4525s HP ProBook 4525s Notebook PC - Maintenance and Service Guide - Page 93
Audio board, Remove the top cover see
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Audio board NOTE: The spare part number for the audio board is 598684-001. Before removing the audio board, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 45). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 46). 6. Remove the optical drive (see Optical drive on page 51). 7. Remove the power button board cable (see Power button board on page 53). 8. Remove the speakers (see Speakers on page 55). 9. Remove the thermal shield (see Thermal shield on page 56). 10. Remove the display assembly (see Display assembly on computers with 15.6-in displays on page 71). 11. Remove the palm rest (see Palm rest on page 67). 12. Remove the hard drive (see Hard drive on page 69). 13. Remove the top cover (see Top cover on page 77). Remove the audio board: 1. Position the computer right-side up with the front toward you. 2. Remove the M2.5×3.0 screw (1) that secures the audio board to the system board. 3. Release the ZIF connector (2) and remove the cable (3). Component replacement procedures 85