HP CQ42-133TU, CQ42-109TU, CQ42-103TU Description Spare part number RTC battery 602745-001

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 52).

5.Remove the following components:

a.Hard drive (see Hard drive on page 53)

b.WLAN (see WLAN module on page 58)

c.Optical drive (see Optical drive on page 56)

d.Keyboard (see Keyboard on page 63)

e.Top cover (see Top cover on page 65)

f.Speaker assembly (see Speaker assembly on page 68)

g.Display assembly (see Display assembly on page 76)

h.System board (see System board on page 83)

Remove the RTC battery:

1.Turn the system board upside down.

2.Release the RTC battery from the clips on the system board (1).