HP CQ35-217TU, CQ35-229TX, CQ35-227TX, CQ35-224TX manual System board, Description Spare part number

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 6).

5.Remove the following components:

a.Hard drive (see “Hard drive” on page 8)

b.Memory module (see “Memory module” on page 10)

c.WLAN module (see “WLAN module” on page 11)

d.Optical drive (see “Optical drive” on page 16)

e.Keyboard (see “Keyboard” on page 18)

f.Keyboard cover (see “Keyboard cover” on page 20)

g.Right speaker (see “Right speaker” on page 22)

h.Top cover (see “Top cover” on page 23).

i.Left speaker (see “Left speaker” on page 28)

j.Display assembly (see “Display assembly” on page 29).

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:

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

■Heat sink (see “Fan/heat sink assembly” on page 44)

■Processor (see “Processor” on page 49)