HP D8C84UT#ABA User Manual Page 33
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Tools and Software Requirements
To service the computer, you need the following:
● Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001)
●
Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)
●
Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
●
Phillips #2 screwdriver
●
Diagnostics software
● HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or HP tamper-
resistant bits (Smart Cover FailSafe Key, PN 166527-002)
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: Metric screws have a black finish. U.S. screws have a silver finish and are used on hard
drives only.
CAUTION: As each subassembly is removed from the computer, it should be placed away from the
work 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: When servicing this computer, ensure that cables are placed 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
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 CPU.
●
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.
Service Considerations 25
- Maintenance and Service Guide 1
- About This Book 3
- Table of contents 5
- 1 Product Features 9
- Front Panel Components 10
- Rear Panel Components 11
- Serial Number Location 12
- Software 13
- Computer Setup—File 18
- Computer Setup—Storage 19
- Computer Setup—Security 20
- Computer Setup—Power 22
- Computer Setup—Advanced 23
- SATA Hard Drives 25
- SATA Hard Drive Cables 25
- SMART ATA Drives 26
- Hard Drive Capacities 26
- Chassis Designations 27
- Generating Static 28
- Grounding the Work Area 29
- Operating Guidelines 30
- Routine Care 31
- Service Considerations 32
- Cables and Connectors 33
- Hard Drives 33
- Lithium Coin Cell Battery 34
- 6 Illustrated parts catalog 35
- Spare parts 29 37
- Spare parts 31 39
- Spare parts 33 41
- Spare parts 35 43
- Preparation for Disassembly 45
- Computer Access Panel 47
- Front Bezel 48
- Bezel Blanks 49
- System Board Connections 50
- Installing Additional Memory 51
- Populating DIMM Sockets 52
- Installing DIMMs 52
- Cable Management 61
- Drive Positions 63
- Description Spare part number 77
- Baffle 636921-001 77
- Front Fan Assembly 78
- Speaker 636925-001 80
- Heat sink 81
- Processor 84
- Power Supply 86
- P2 PWRCMD 87
- P3 PWRCPU 87
- System Board 88
- Type 1 Battery Holder 91
- Type 2 Battery Holder 91
- Type 3 Battery Holder 92
- Orientation 93
- Installing a Security Lock 94
- Installing a Security Lock 87 95
- Front Bezel Security 96
- A Power Cord Set Requirements 98
- Country-Specific Requirements 99
- B POST Error Messages 100
- Audible Codes 102
- Safety and Comfort 104
- Helpful Hints 105
- Solving General Problems 107
- Solving General Problems 101 109
- Solving Power Problems 111
- Solving Hard Drive Problems 113
- Solving Display Problems 118
- Solving Display Problems 111 119
- Solving Display Problems 113 121
- Solving Audio Problems 123
- Solving Printer Problems 125
- Solving Network Problems 131
- Solving Network Problems 125 133
- Solving Memory Problems 134
- Solving Memory Problems 127 135
- Solving Processor Problems 136
- Cause Solution 142
- Solving Software Problems 144
- Resetting the Password Jumper 146
- F System Recovery 151
- System Recovery options 152
- Recovery media 154
- G Specifications 156
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