Compaq Presario CQ40-400 Compaq Presario CQ40 Notebook PC - Maintenance and Se - Page 48

RTC battery, cover to the computer.

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RTC battery Description RTC battery (includes two-sided tape) Spare part number 486835-001 Before removing the RTC battery, 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 34). Remove the RTC battery: 1. Loosen the two Phillips PM2.5×5.0 captive screws (1) that secure the RTC battery compartment cover to the computer. 2. Lift the right side of the RTC battery compartment cover (2), swing it to left, and remove the cover (3). 3. Disconnect the RTC battery cable (1) from the system board. 40 Chapter 4 Removal and replacement procedures

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RTC battery
Description
Spare part number
RTC battery (includes two-sided tape)
486835-001
Before removing the RTC battery, 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
34
).
Remove the RTC battery:
1.
Loosen the two Phillips PM2.5×5.0 captive screws
(1)
that secure the RTC battery compartment
cover to the computer.
2.
Lift the right side of the RTC battery compartment cover
(2)
, swing it to left, and remove the
cover
(3)
.
3.
Disconnect the RTC battery cable
(1)
from the system board.
40
Chapter 4
Removal and replacement procedures