HP ProBook 4545s HP ProBook 4545s Notebook PC - Maintenance and Service Guide - Page 78

RTC battery, Metal heat shield see

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RTC battery Description RTC battery Spare part number 683601-001 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). 5. Remove the following components: a. Bottom door (see Bottom door on page 35). b. Hard drive (see Hard drive on page 42). c. Optical drive (see Optical drive on page 39). d. Metal heat shield (see Metal heat shield on page 48). e. Fan (see Fan on page 50). f. Heat sink (see Heat sink on page 51). g. Keyboard (see Keyboard on page 44). h. Top cover (see Top cover on page 55). i. System board (see System board on page 67). Remove the RTC battery: 1. Position the system board upside-down with the front toward you. 2. Use a screwdriver to loosen the battery from the slot (1). 70 Chapter 4 Removal and replacement procedures

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RTC battery
Description
Spare part number
RTC battery
683601-001
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
).
5.
Remove the following components:
a.
Bottom door (see
Bottom door
on page
35
).
b.
Hard drive (see
Hard drive
on page
42
).
c.
Optical drive (see
Optical drive
on page
39
).
d.
Metal heat shield (see
Metal heat shield
on page
48
).
e.
Fan (see
Fan
on page
50
).
f.
Heat sink (see
Heat sink
on page
51
).
g.
Keyboard (see
Keyboard
on page
44
).
h.
Top cover (see
Top cover
on page
55
).
i.
System board (see
System board
on page
67
).
Remove the RTC battery:
1.
Position the system board upside-down with the front toward you.
2.
Use a screwdriver to loosen the battery from the slot
(1)
.
70
Chapter 4
Removal and replacement procedures