HP ProBook 6540b User Manual

4–32 Maintenance and Service Guide
Removal and replacement procedures
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 “Battery” on page 4-7).
5. Remove the keyboard (see “Keyboard” on page 4-25).
Remove the RTC battery:
1. Disconnect the RTC battery cable 1 from the system board.
2. Detach the RTC battery 2 from the clip built into the top cover. (The RTC battery is attached to the top cover
with double-sided tape.)
Reverse this procedure to install the RTC battery.
Description Spare part number
For use only with HP Compaq 6545b computer models 583268-001
For use only with HP Compaq 6540b computer models 593860-001
For use only with HP Compaq 6445b computer models 583268-001
For use only with HP Compaq 6440b computer models 593861-001

HP ProBook 6540b Specifications

General

Graphics	Intel HD Graphics
Operating System	Windows 7 Professional
Processor	Intel Core i5-430M
RAM	Up to 8GB DDR3
Storage	250 GB HDD (7200 rpm)
Display	15.6-inch diagonal LED-backlit HD anti-glare (1366 x 768)
Battery	6-cell Li-Ion
Weight	2.6 kg (5.7 lbs)
Chipset	Mobile Intel HM57 Express
Optical Drive	DVD+/-RW SuperMulti DL
Wireless	802.11a/b/g/n
Ports	USB 2.0, VGA, DisplayPort, eSATA, RJ-45, headphone/microphone combo jack