Compaq Presario CQ57-300 Maintenance and Service Guide - Page 79

RTC battery, Power connector cable see

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RTC battery Description RTC battery (includes cable and double-sided tape) Spare part number 646132-001 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 36), and then remove the following components: ● Optical drive (see Optical drive (select models only) on page 37) ● WLAN module (see WLAN module on page 40) ● Keyboard (see Keyboard on page 46) ● Top cover (see Top cover on page 49) ● USB board (see USB board on page 56) ● Power connector cable (see Power connector cable on page 57) ● Display assembly (see Display assembly on page 61) ● System board (see System board on page 68) Remove the RTC battery: 1. Turn the system board upside down, with the front toward you. 2. Disconnect the RTC battery cable (1) from the system board. Component replacement procedures 71

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RTC battery
Description
Spare part number
RTC battery (includes cable and double-sided tape)
646132-001
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
36
), and then remove the following components:
●
Optical drive (see
Optical drive (select models only)
on page
37
)
●
WLAN module (see
WLAN module
on page
40
)
●
Keyboard (see
Keyboard
on page
46
)
●
Top cover (see
Top cover
on page
49
)
●
USB board (see
USB board
on page
56
)
●
Power connector cable (see
Power connector cable
on page
57
)
●
Display assembly (see
Display assembly
on page
61
)
●
System board (see
System board
on page
68
)
Remove the RTC battery:
1.
Turn the system board upside down, with the front toward you.
2.
Disconnect the RTC battery cable
(1)
from the system board.
Component replacement procedures
71