HP Pavilion HDX9575LA HP Pavilion HDX Entertainment Notebook PC - Maintenance - Page 89

RTC battery

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3. Remove the audio connector board (3) from the base enclosure. Reverse this procedure to install the audio connector board. RTC battery NOTE: Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. Description RTC battery Spare part number 452319-001 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 38). 5. Remove the following components: a. Hard drive (see Hard drive on page 45) b. Optical drive (see Optical drive on page 52) c. Keyboard (see Keyboard on page 54) d. Hinge cover (see Hinge cover on page 56) e. Rear cover (see Rear cover on page 57) f. Top cover (see Top cover on page 59) Component replacement procedures 81

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3
.
Remove the audio connector board
(3)
from the base enclosure.
Reverse this procedure to install the audio connector board.
RTC battery
NOTE:
Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords
and CMOS settings to be cleared.
Description
Spare part number
RTC battery
452319-001
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
38
).
5
.
Remove the following components:
a
.
Hard drive (see
Hard drive
on page
45
)
b
.
Optical drive (see
Optical drive
on page
52
)
c
.
Keyboard (see
Keyboard
on page
54
)
d
.
Hinge cover (see
Hinge cover
on page
56
)
e
.
Rear cover (see
Rear cover
on page
57
)
f
.
Top cover (see
Top cover
on page
59
)
Component replacement procedures
81