HP 311c-1070EF manual System board

Removal and replacement procedures

System board

Description	Spare part number
System board (includes processor, 1024-MB base memory, and replacement thermal material):
Includes Intel Atom N280 1.66-GHz processor, 512-KB Level 2 cache, 667-MHz front-side	580000-001
bus (FSB) for use with the HP Mini and Compaq Mini
Includes Intel Atom N270 1.6-GHz processor, 512-KB Level 2 cache, 533-MHz front-side bus (FSB)	579999-001
for use with the HP Mini and Compaq Mini
Includes Intel Pentium 1.3-GHz processor, 2048-KB Level 2 cache, 800-MHz FSB for use with HP	581751-001
Pavilion
Includes Intel Pentium 1.2-GHz processor, 1024-KB Level 2 cache, 800-MHz FSB for use with the	581750-001
HP Pavilion

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 battery (see “Battery” on page 4-7).

5.Remove the following components:

a.Accessory compartment cover (see “WLAN module” on page 4-9)

b.Hard drive (see “Hard drive” on page 4-18)

c.Keyboard (see “Keyboard” on page 4-21)

d.Top cover (see “Top cover” on page 4-24)

e.Display assembly (see “Display assembly” on page 4-31)

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

■SIM (see “SIM” on page 4-8)

■WLAN module (see “WLAN module” on page 4-9)

■RTC battery (see “RTC battery” on page 4-15)

■Expansion memory module (see “Expansion memory module” on page 4-16)

■WWAN module (see “WWAN module” on page 4-13)

■Power connector (see “Power connector” on page 4-41)

■Fan (see “Fan” on page 4-42)

■Heat sink (see “Heat sink assembly” on page 4-43)

4–38 Maintenance and Service Guide