HP CQ62-111TU, CQ62-255TU, CQ62-252TX manual System board, Memory module see “Memory module” on page

Removal and replacement procedures

System board

✎Thematerial.system board spare part kit includes UMA or discrete graphics subsystem memory and replacement thermal

Description	Spare part number
HM55 Discrete system board	595181-001
HM55 UMA system board	595182-001
HM55 HDMI Discrete system board	595183-001
HM44 HDMI UMA system board	595184-001
HM55 HD545V discrete system board (for model 1.1 only)	615577-001
HM55 HD545V discrete system board with HDMI card reader (for model 1.1 only)	615578-001
GL40 UMA system board (for models 1.1 and 1.2 only)	605139-001
GL40 UMA system board with HDMI card reader (for models 1.1 and 1.2 only)	605140-001
HD5470/512 MB discrete system board (for model 1.2 only)	615579-001
HD5470/512 MB discrete system board with HDMI card reader (for model 1.2 only)	615580-001
HD5470/1 G discrete system board (for model 1.2 only)	615581-001
HD5470/1 G discrete system board with HDMI card reader (for model 1.2 only)	615582-001
GL40 DDR2 UMA system board (for model 1.1 only)	616448-001
GL40 DDR2 UMA system board with HDMI card reader (for model 1.1 only)	616449-001
HM55 WiMax UMA system board with HDMI card reader (for model 1.2 only)	628482-001

Before removing the system board:

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 disconnecting the power cord from the AC outlet and then disconnecting the AC adapter from the computer.

4.Remove the battery (see “Battery” on page 4-7)

5.Remove the battery (see “Battery” on page 4-7).

6.Remove the battery (see “Battery” on page 4-7).

7.Remove the hard drive (see “Hard drive” on page 4-8).

8.Remove the memory module (see “Memory module” on page 4-10).

9.Remove the wireless module (see “Wireless module” on page 4-12).

10.Remove the optical drive (see “Optical drive” on page 4-14).

11.Remove the keyboard (see “Keyboard” on page 4-17).

12.Remove the top cover (see “Top cover” on page 4-20).

13.Remove the display assembly (see “Display assembly” on page 4-26).

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:

■Memory module (see “Memory module” on page 4-10)

■Wireless module (see “Wireless module” on page 4-12)

Maintenance and Service Guide 4–37