HP ProDesk 400 G7 SFF, Maintenance And Service Manual

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Service considerations
Keep these considerations in mind during the disassembly and assembly of the computer.
Tools and software requirements
Servicing the computer requires these tools.
●
Torx T-15 screwdriver
● Flat-bladed screwdriver (can sometimes be used in place of the Torx screwdriver)
● Phillips P1 screwdriver
● Nonconductive, nonmarking pry tool
● Diagnostics software
Screws
The screws used in the computer are not interchangeable. They could have standard or metric threads and
might be of different lengths.
If you use an incorrect screw during the reassembly process, it can damage the unit. HP strongly recommends
that you keep all screws that you remove during disassembly with the removed part and then return them to
their proper locations.
IMPORTANT: As you remove each subassembly from the computer, place it away from the work area to
prevent damage.
Cables and connectors
Use this information properly handle cables.
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 route
the cables so that they cannot be caught or snagged by parts being removed or replaced.
IMPORTANT: When servicing this computer, be sure to place cables in their proper location during the
reassembly process. Improper cable placement can damage the computer.
Hard drives
Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This advice
applies to failed drives as well as replacement spares.
● If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging and
label the package “Fragile: Handle With Care.”
●
Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective
packaging until they are actually mounted in the computer.
● Avoid dropping drives from any height onto any surface.
● If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the
computer is on or in standby mode.
18 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation ENWW