HP 4 B5T04UA, 4 B5T03UA manual Removal and replacement procedures

Description	Spare part number
For use only with computer models equipped with an Intel 1.4GHz processor, but not WWAN	686088–001
capability (includes replacement thermal material)	686088–501
	686088–601
	686090–001
	686090–501
	686090–601
For use only with computer models equipped with an Intel 1.5Hz processor, but not WWAN	693655–001
capability (includes replacement thermal material)	693655–501

693655–601

693656–001

693656–501

693656–601

Before removing the system board, 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 display panel (see Display panel on page 31).

5.Remove the base enclosure (see Base enclosure on page 33).

6.Remove the battery (see Battery on page 35).

7.Remove the WLAN module (see WLAN module on page 43).

8.Remove the hard drive (see Hard drive on page 37).

9.Disconnect the display panel cable from the system board (see Display panel on page 31).

10.Remove the speaker (see Speakers on page 58).

11.Remove the power connector and cable (see Power connector cable on page 57).

12.Remove the USB/Audio and cable (see USB/Audio).

When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board:

●RTC battery (see RTC battery on page 40)

●Memory module (see Memory module on page 41)

●Power connector cable (see Power connector cable on page 57)

●Fan (see Heat sink on page 51)

●Heat sink (see Heat sink on page 51)

48 Chapter 4 Removal and replacement procedures