HP ProBook 4311s HP ProBook 4310s Notebook PC and HP ProBook 4311s Notebook PC - Page 25

Bottom components

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External component identification Bottom components Item Component (1) SIM slot (select models only) (2) Hard drive bay (3) Memory module compartment (4) Vents (3) (5) Battery release latch (6) Battery bay Description Contains a wireless subscriber identity module (SIM). The SIM slot is located inside the battery bay. Holds the hard drive and a Bluetooth device. Contains the memory module slots and a wireless LAN module slot. Ä To prevent an unresponsive system and the display of a warning message, replace the WLAN module with only a 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. Enable airflow to cool internal components. ✎ The computer fan starts up automatically to cool internal components and prevent overheating. It is normal for the internal fan to cycle on and off during routine operation. Releases the battery from the battery bay. Holds the battery. 2-10 Maintenance and Service Guide

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2–10
Maintenance and Service Guide
External component identification
Bottom components
Item
Component
Description
(1)
SIM slot (select models only)
Contains a wireless subscriber identity module (SIM). The SIM slot is located
inside the battery bay.
(2)
Hard drive bay
Holds the hard drive and a Bluetooth device.
(3)
Memory module compartment
Contains the memory module slots and a wireless LAN module slot.
Ä
To prevent an unresponsive system and the display of a warning
message, replace the WLAN module with only a 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.
(4)
Vents (3)
Enable airflow to cool internal components.
✎
The computer fan starts up automatically to cool internal components
and prevent overheating. It is normal for the internal fan to cycle on and
off during routine operation.
(5)
Battery release latch
Releases the battery from the battery bay.
(6)
Battery bay
Holds the battery.