HP ProOne 400 G2 Base Model 20-inch Touch All-in-One PC User Manual Page 138
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Network controller stops working without apparent cause.
Cause Solution
The files containing the network drivers are corrupted. Reinstall the network drivers using the Recovery Disc Set in
Windows 7 or Windows recovery tools in Windows 8.
If necessary, download the softpaq from the web (from a
different computer).
The cable is not securely connected. Ensure that the cable is securely attached to the network
connector and that the other end of the cable is securely
attached to the correct device.
The network controller is defective. Contact an authorized service provider.
New network card will not boot.
Cause Solution
New network card may be defective or may not meet industry-
standard specifications.
Install a working, industry-standard NIC, or change the boot
sequence to boot from another source.
Cannot connect to network server when attempting Remote System Installation.
Cause Solution
The network controller is not configured properly. Verify Network Connectivity, that a DHCP Server is present,
and that the Remote System Installation Server contains the
NIC drivers for your NIC.
System setup utility reports unprogrammed EEPROM.
Cause Solution
Unprogrammed EEPROM. Contact an authorized service provider.
Solving Memory Problems
If you encounter memory problems, some common causes and solutions are listed in the following
table.
CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on
the Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must
unplug the computer power cord before attempting to reseat, install, or remove a memory module.
For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory.
Otherwise, the computer will not boot the operating system.
128 Chapter 8 Troubleshooting Without Diagnostics
- Business PC 1
- About This Book 3
- Table of contents 5
- 1 Product features 11
- Front components 13
- Side components 14
- Rear components 15
- Adjusting the stand 16
- Serial number location 17
- Software 18
- Windows 8 19
- Downloading Windows 8 updates 20
- 3 Illustrated parts catalog 21
- Misc parts 23
- Keyboards 25
- 4 Routine care, SATA drive 28
- Generating static 29
- Grounding the work area 30
- Operating guidelines 31
- Routine care 32
- Service considerations 33
- Cables and connectors 34
- Hard Drives 34
- SATA hard drives 35
- SATA hard drive cables 36
- SMART ATA drives 36
- Cable management 36
- 5 Removal and Replacement 37
- Rear cover 40
- Replacing drives 43
- Replacing a hard drive 44
- Installing a hard drive 48
- Webcam module 53
- Speakers 55
- Bottom stand 58
- 5. Remove the stand 59
- Front bezel 60
- Power button board 61
- Converter board 63
- VESA panel 65
- System board shield 66
- DDR3-SDRAM SODIMMs 67
- Populating SODIMM sockets 68
- Installing SODIMMs 68
- Heat sink 75
- Processor 77
- WLAN module 79
- Description 81
- Optical drive cable 81
- Hard drive cable 81
- System board 83
- System board callouts 86
- Display panel 88
- Computer Setup—File 95
- Computer Setup—Storage 96
- Computer Setup—Security 98
- Computer Setup—Power 101
- Computer Setup—Advanced 102
- 7 HP PC Hardware Diagnostics 105
- 8 Troubleshooting Without 107
- Diagnostics 107
- Helpful Hints 108
- Solving General Problems 110
- Solving Power Problems 114
- Solving Hard Drive Problems 116
- Solving Display Problems 121
- Solving Audio Problems 126
- Solving Printer Problems 128
- Solving Network Problems 134
- Solving Memory Problems 138
- Solving Processor Problems 140
- Solving Software Problems 146
- Contacting Customer Support 148
- 9 Backup and Recovery 149
- System Recovery 150
- Backing up your information 154
- Performing a system recovery 155
- Using f11 recovery tools 156
- 10 POST Error Messages 158
- A Statement of Volatility 176
- B Power Cord Set Requirements 178
- Country-specific requirements 179
- C Specifications 180
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