HP CQ42-220AX, CQ42-205AU, CQ42-218AX, CQ42-219AX manual System board, Description Spare part number

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)
System board for use in models with discrete graphics subsystem with HD6370/512M (for model	632183-001
1.2 only)
System board for use in models with discrete graphics subsystem with HD6370/512M with HDMI	632184-001
card reader(for model 1.2 only)
System board for use in models with discrete graphics subsystems HD6370/1G (for model 1.2	632185-001
only)
System board for use in models with discrete graphics subsystems HD6370/512M with HDMI card	632186-001
reader (for model 1.2 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 86)

●Memory modules (see Memory module on page 60)

●WLAN module (see WLAN module on page 58)

●Modem module (see Modem module on page 70) 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.

ENWW Component replacement procedures 81