Rtc Battery - HP ProBook 4520s Maintenance And Service Manual

RTC battery

Description
RTC battery
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
5. Remove the switch cover and keyboard (see
6. Remove the optical drive (see
7. Remove the power button board cable (see
8. Remove the speakers (see
9. Remove the thermal shield (see
10. Remove the display assembly (see
on page 80
11. Remove the palm rest (see
12. Remove the hard drive (see
13. Remove the top cover (see
Remove the RTC battery:
1. Position the computer right-side up with the front toward you.
96 Chapter 4 Removal and replacement procedures
Battery on page
Optical drive on page
Speakers on page
Thermal shield on page
Display assembly on computers with 17.3-in displays
or Display assembly on computers with 15.6-in displays on page
Palm rest on page
Hard drive on page
Top cover on page
50).
Switch cover and keyboard on page
56).
Power button board on page
60).
62).
76).
78).
92).
Spare part number
449137-001
51).
58).
86).