Service Considerations; Tools And Software Requirements; Screws; Cables And Connectors - HP ProDesk 400 G4 Maintenance And Service Manual

Service considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and
assembly of the computer.

Tools and software requirements

To service the computer, you need the following:
● Torx T-15 screwdriver
● Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
Phillips #2 screwdriver
●
● Diagnostics software

Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may
be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP
strongly recommends that all screws removed during disassembly be kept with the part that was removed,
then returned to their proper locations.
CAUTION:
CAUTION:
area to prevent damage.

Cables and connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to
avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from
the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting
the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by
parts being removed or replaced.
CAUTION:
the reassembly process. Improper cable placement can damage the computer.
20 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Metric screws have a black finish. U.S. screws have a silver finish and are used on hard drives only.
As each subassembly is removed from the computer, it should be placed away from the work
When servicing this computer, ensure that cables are placed in their proper location during