HP ProBook 6440b HP ProBook 6545b, 6540b, 6445b and 6440b Notebook PC - Mainte - Page 105

Removal and replacement procedures Fan Description Fan Spare part number 583266-001 ✎ To properly ventilate the computer, allow at least 7.6 cm (3 in) of clearance on the left side of the computer. The computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and is designed to turn on automatically when high temperature conditions exist. These conditions are affected by high external temperatures, system power consumption, power management/battery conservation configurations, battery fast charging, and software requirements. Exhaust air is displaced through the ventilation grill located on the left side of the computer. Before removing the fan, 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 4-7). 5. Remove the keyboard (see "Keyboard" on page 4-23). 6. Remove the switch cover (see "Switch cover" on page 4-30). Remove the fan: 1. Disconnect the fan cable 1 from the system board. 2. Remove the two slotted Torx T8M2.5×7.0 screws 2 that secure the fan to the system board. 3. Remove the fan 3. Reverse this procedure to install the fan. 4-36 Maintenance and Service Guide