HP ProBook 6440b HP ProBook 6545b, 6540b, 6445b and 6440b Notebook PC - Mainte - Page 33

External component identification Bottom components Item (1) (2) Component Battery bay SIM slot (3) Battery release latch (4) Docking connector (5) Accessory battery connector (6) Vents (6) (7) Hard drive bay (8) Memory module compartment (9) HP Mobile Broadband Module compartment (10) Bluetooth compartment Description Holds the battery. Contains a wireless subscriber identity module (SIM) (select models only). The SIM slot is located inside the battery bay. Releases the battery from the battery bay. Connects an optional docking device. Connects an optional accessory battery. 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. Holds the hard drive. Contains an expansion memory module slot. Contains an HP Mobile Broadband Module (select models only). ✎ 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. Contains a Bluetooth device. 2-18 Maintenance and Service Guide