HP Presario CQ57-200 Compaq Presario CQ57 Notebook PC - Maintenance and Servic - Page 78

RTC battery, Display assembly 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 35), and then remove the following components: ● Optical drive (see Optical drive on page 36) ● WLAN module (see WLAN module on page 39) ● Keyboard (see Keyboard on page 45) ● Top cover (see Top cover on page 48) ● USB board (see USB board on page 55) ● Power connector cable (see Power connector cable on page 56) ● Display assembly (see Display assembly on page 60) ● System board (see System board on page 67) 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. 70 Chapter 4 Removal and replacement procedures

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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
35
), and then remove the following components:
●
Optical drive (see
Optical drive
on page
36
)
●
WLAN module (see
WLAN module
on page
39
)
●
Keyboard (see
Keyboard
on page
45
)
●
Top cover (see
Top cover
on page
48
)
●
USB board (see
USB board
on page
55
)
●
Power connector cable (see
Power connector cable
on page
56
)
●
Display assembly (see
Display assembly
on page
60
)
●
System board (see
System board
on page
67
)
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.
70
Chapter 4
Removal and replacement procedures