Compaq CQ42 manual System board, RTC battery see RTC battery on page

Models: CQ42

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System board

System board

Description

Spare part number

 

 

System board for use in models with UMA graphics subsystem memory,

592808-001

 

 

System board for use in models with DSC HD5430 MDM CR (for model 1.0 only)

592811-001

 

 

System board for use in models with DSC HD5430 (for model 1.0 only)

592810-001

 

 

System board for use in models with UMA graphics subsystem memory

592809-001

 

 

System board for use in models with HD545V DSC (for model 1.0 only)

611554-001

 

 

System board for use in models with HD545V DSC CR (for model 1.0 only)

611555-001

 

 

System board for use in models with discrete graphics subsystem with HD5470/512 MB (for

616405–001

model 1.1 only)

 

 

 

System board for use in models with discrete graphics subsystem with HD5470/512 MB with

616406–001

HDMI card reader (for model 1.1 only)

 

 

 

System board for use in models with discrete graphics subsystem with HD5470/1 G (for model 1.1

616407–001

only)

 

 

 

System board for use in models with discrete graphics subsystem with HD5470/1 G with HDMI

616408–001

card reader (for model 1.1 only)

 

 

 

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 78)

Memory modules (see Memory module on page 51)

WLAN module (see WLAN module on page 49)

Modem module (see Modem module on page 61) 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 43).

5.Remove the following components:

a.Hard drive (see Hard drive on page 44)

b.WLAN (see WLAN module on page 49)

c.Optical drive (see Optical drive on page 47)

d.Keyboard (see Keyboard on page 53)

e.Top cover (see Top cover on page 55)

Component replacement procedures 73

Page 83
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Compaq CQ42 manual System board, RTC battery see RTC battery on page, Memory modules see Memory module on page