HP 20-k127cl Mobile, 20-k120us Mobile manual Description Spare part number USB board 728064-001

2.Detach the RTC battery (2) from the middle frame. (The RTC battery is attached to the middle frame with double-sided adhesive.)

3.Remove the RTC battery.

Reverse this procedure to install the RTC battery.

USB board

NOTE: The USB board spare part kit does not include the USB board ribbon cable. The USB board ribbon cable is included in the Cable Kit, spare part number 728048-001. See Cable Kit on page 12 for more Cable Kit information.

Description	Spare part number
USB board	728064-001

Before removing the USB board, follow these steps:

1.Turn off 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 the power from the computer by unplugging the power cord from the computer.

3.Disconnect all external devices from the computer.

4.Remove the bottom cover (see Bottom cover on page 23).

5.Remove the rear cover (see Rear cover on page 26).

6.Disconnect the battery cable (see Hard drive on page 27).

32 Chapter 4 Removal and replacement procedures