WWAN module

NOTE: Only computers with UMA graphics include a WWAN module.

NOTE: The spare part number for the HP un2420 Broadband Module is 531993-001.

CAUTION: To prevent an unresponsive system, replace the wireless module only with a wireless module authorized for use in the computer by the governmental agency that regulates wireless devices in your country or region. If you replace the module and then receive a warning message, remove the module to restore computer functionality, and then contact technical support through Help and Support.

Before removing the WWAN module, 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)

Remove the WWAN module:

1.Position the computer right-side up with the front toward you.

2.Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.

NOTE: The red WWAN antenna cable is connected to the WWAN module “Main” terminal. The blue WWAN antenna cable is connected to the WWAN module “Aux” terminal. The terminals and cables are both identified by number and color.

3.Remove the two Torx M2.5×6.0 screws (2) that secure the WWAN module to the computer. (The edge of the module opposite the slot rises away from the computer.)

76 Chapter 4 Removal and replacement procedures

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HP 4720S, 4520S manual Wwan module
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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.

Another characteristic that makes the HP ProBook 4720s stand out is its security features. The optional fingerprint reader and HP’s Client Security software provide enhanced protection for sensitive data. This focus on security is crucial for professionals who handle confidential information.

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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