HP ProBook 4525s Service Manual

4. 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.)
5. Remove the WWAN module (3) by pulling the module away from the slot at an angle.
NOTE: WWAN modules are designed with a notch (4) to prevent incorrect insertion.
Reverse this procedure to install the WWAN module.
Heat sink and fan
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
Heat sink for use in computers with UMA graphics subsystems 598676-001
Heat sink for use in computers with discrete graphics subsystems 613291-001
Before removing the heat sink, 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.
Component replacement procedures 63

HP ProBook 4525s Specifications

General

Graphics	ATI Mobility Radeon HD 4250
Processor	AMD Turion II, AMD Athlon II
Display	15.6-inch diagonal LED-backlit HD anti-glare (1366 x 768 resolution)
Memory	Up to 8 GB DDR3
Storage	250GB, 320GB, 500GB HDD
Operating System	Genuine Windows 7 Professional, Genuine Windows 7 Home Premium, Genuine Windows 7 Home Basic
Battery	6-cell Lithium-Ion
Chipset	AMD M880G
Optical Drive	DVD+/-RW SuperMulti DL
Wireless	802.11b/g/n, Bluetooth 2.1
Audio	Integrated stereo speakers, Integrated microphone
Ports	3 USB 2.0, VGA, HDMI, RJ-45, headphone/microphone combo jack
Card Reader	SD/MMC
Webcam	2 MP Webcam