System Board - HP ProDesk 400 G4 Maintenance And Service Manual

System board

NOTE: The system board spare park kit includes replacement thermal material.
Follow these steps to remove the system board:
1. Prepare the computer for disassembly (see
2. Remove the access panel (see
a. Drive cage (see
b. Expansion card (see
c. Fan cowling (see
d. Fan-sink (see
NOTE:
the defective system board and installed on the replacement system board:
● WLAN module (see
● Memory module (see
● Expansion card (see
● Processor (see
3. Disconnect the speaker cable (1) from the system board.
4. Disconnect the wireless antenna cables (2) from the terminals on the WLAN module.
NOTE:
The wireless antenna cable labeled "2/AUX" connects to the WLAN module "Aux" terminal.
5. Disconnect the power supply cable (3) from the system board.
42 Chapter 4 Removal and replacement procedures
Access panel on page
Drive cage on page
Expansion card on page
Fan cowling on page
Fan-sink on page
When replacing the system board, be sure that the following components are removed from
WLAN module on page
Memory module on page
Expansion card on page
Processor on page
The wireless antenna cable labeled "1/MAIN" connects to the WLAN module "Main" terminal.
Preparation for disassembly on page
24), and then remove the following components:
28)
35)
38)
39)
32)
34)
35)
41)
23).