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 55).

5.Remove the switch cover and keyboard (see Switch cover and keyboard on page 56).

6.Remove the optical drive (see Optical drive on page 61).

7.Remove the power button board cable (see Power button board on page 63).

8.Remove the speakers (see Speakers on page 65).

9.Remove the thermal shield (see Thermal shield on page 67).

10.Remove the display assembly (see Display assembly on computers with 17.3-in displays on page 89 or Display assembly on computers with 15.6-in displays on page 96).

11.Remove the palm rest (see Palm rest on page 84).

12.Remove the hard drive (see Hard drive on page 87).

13.Remove the top cover (see Top cover on page 103).

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).

112 Chapter 4 Removal and replacement procedures

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HP 4720S, 4520S manual Audio board
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4720S, 4520S specifications

The HP ProBook 4720s is a well-engineered business laptop that combines performance, durability, and affordability, making it suitable for professionals and small business owners alike. Introduced as part of the HP ProBook series, this model stands out for its robust build quality and essential features tailored to meet the demands of various work environments.

One of the main features of the HP 4720s is its 17.3-inch display. This spacious screen provides a generous workspace for multitasking, with a resolution of 1600 x 900 pixels. The anti-glare technology helps reduce reflections, ensuring that users can work comfortably in different lighting conditions. The large screen also makes it suitable for presentations and sharing visuals with colleagues.

Under the hood, the HP ProBook 4720s is equipped with Intel's second generation Core processors. The inclusion of options such as the Intel Core i5 and i7 provides users with the power necessary for demanding applications while maintaining energy efficiency. With up to 8GB of DDR3 RAM, multitasking is seamless, allowing users to run multiple applications simultaneously without experiencing lag.

Storage options are varied, including traditional hard drives and solid-state drives which offer faster data access speeds. This flexibility ensures that users can choose the configuration that best fits their needs, balancing performance and storage capacity.

In terms of connectivity, the HP 4720s offers a range of ports including USB 2.0 and USB 3.0, HDMI, and Ethernet, providing users with versatile options for connecting peripherals and external displays. The integrated webcam and microphone are essential for video conferencing, essential in today’s remote working environment.

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Moreover, the laptop's design features a sturdy chassis that meets military specifications for durability. This ruggedness is complemented by a spill-resistant keyboard, which enhances its usability in various environments.

Overall, the HP ProBook 4720s embodies a balance of performance, functionality, and durability. Its features cater well to business users seeking a reliable device, making it a commendable choice in the competitive landscape of laptops. Whether for office use or on-the-go productivity, the HP 4720s delivers a solid computing experience.
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