Maintenance and Service Guide HP ProDesk 400 G1 Microtower HP ProDesk 480 G1 Microtower HP ProDesk 490 G1 Microtower HP ProDesk 400 G1 Small Form Factor

System board
Description Spare part number
System board for use in models without Windows 8 (includes thermal material) 718414-001
System board for use in models with Windows 8 Standard (includes thermal material) 718414-501
System board for use in models with Windows 8 Professional (includes thermal material) 718414-601
System board for use only in models in the People’s Republic of China with NetClone (includes
thermal material)
745239-001
1. Prepare the computer for disassembly (Preparation for disassembly on page 92).
2. Remove the access panel (
Access panel on page 93).
3. When replacing the system board, make sure the following components are removed from the
defective system board and installed on the replacement system board:
●
Memory modules (
Memory on page 97)
●
Expansion cards (
Expansion card on page 100)
●
Fan sink (
Fan sink on page 130)
●
Processor (
Processor on page 132)
4. Remove the fan duct from the chassis (
Fan duct on page 121).
5. Rotate the drive cage to its upright position.
6. Disconnect all data and power cables from the system board.
7. Remove the eight Torx screws that secure the system board to the chassis.
134 Chapter 6 Removal and replacement procedures: Small Form Factor