HP ProBook 4740s HP ProBook 4740s Notebook PC - Maintenance and Service Guide - Page 66

Speaker assembly, Before removing the speaker assembly, follow these steps

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5. Remove the fan from the computer (2). Reverse this procedure to install the fan. NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-in) 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. Speaker assembly Description Speaker assembly Spare part number 684615-001 NOTE: You must remove the speakers to access the screws that secure the display. Before removing the speaker assembly, 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. 58 Chapter 4 Removal and replacement procedures

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5.
Remove the fan from the computer
(2)
.
Reverse this procedure to install the fan.
NOTE:
To properly ventilate the computer, allow at least a 7.6-cm (3-in) 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.
Speaker assembly
Description
Spare part number
Speaker assembly
684615-001
NOTE:
You must remove the speakers to access the screws that secure the display.
Before removing the speaker assembly, 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.
58
Chapter 4
Removal and replacement procedures