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Testing power supply
Before replacing the power supply, use the Built-In Self-Test (BIST) feature to learn if the power supply
still works.
To test the power supply:
1.
Disconnect the AC power.
2.
Remove the internal power supply cables from the system board. (You do not need to remove the
power supply from the chassis.)
3.
If necessary, disconnect the PCIe power cable from the graphics card.
4.
Plug in AC power and verify the following:
● If the green BIST LED on the rear of the workstation is illuminated and the fan is spinning, the
power supply is functional.
●
If the green BIST LED is not illuminated or the fan is not spinning, replace the power supply.
See the Rear panel components section of this service guide to locate the BIST LED on this workstation.
Table 6-2 Power supply problems
Problem Cause Solution
Power supply shuts down
intermittently.
Power supply fault. Replace the power supply.
Workstation powers off and the
Power LED flashes red 2 times
(once every second), followed by a
2-second pause.
Processor thermal protection is
activated.
A fan might be blocked or not
turning.
OR
The processor heatsink fan
assembly is not properly
attached to the processor.
1.
Ensure that the workstation air vents are not blocked.
2.
Open the access panel and press the workstation
power button.
3.
Verify that the system fan is running.
4.
Verify that the processor heatsink fan spins.
If the heatsink fan is not spinning, verify that the fan
cable is plugged into the system board connector.
Verify that the fan is properly seated.
5.
Replace the processor heatsink.
Power LED flashes red (once every
2 seconds).
Power failure (power supply is
overloaded).
1.
Determine whether a device is causing the problem
by performing the following:
a.
Disconnect AC power.
b.
Remove all attached devices.
c.
If necessary, disconnect the PCIe power cable
from the graphics card.
d.
Power on the workstation.
If the system enters the POST, perform the following:
a.
Power off the workstation.
b.
Replace one device at a time and repeat this
procedure until a failure occurs.
ENWW
Troubleshooting scenarios and solutions
175
- HP Z400 Workstation 1
- About this guide 3
- Table of contents 5
- 1 Product overview 13
- System board architecture 14
- Processor technology 15
- Memory technology 15
- Graphics 15
- Expansion card slots 16
- Additional features 16
- Workstation components 17
- Front panel components 18
- Rear panel components 19
- Workstation specifications 20
- Power supply currents 21
- Power supply specifications 22
- System fans 23
- Resetting the power supply 23
- Environmental specifications 24
- ENERGY STAR Qualification 25
- ERP compliance mode 26
- Accessibility 26
- Hyper-threading 26
- SATA Power Management 27
- Intel Turbo Boost Technology 27
- HP Cool Tools 27
- Ensuring proper ventilation 28
- Setting up Novell SLED 33
- Updating the workstation 33
- Determining current BIOS 34
- Upgrading device drivers 35
- Restore methods 36
- Ordering backup software 37
- Creating RestorePlus! media 38
- Restoring Novell SLED 40
- Creating restore media 41
- 4 System management 42
- BIOS ROM 43
- Workstation management 54
- Installing a remote system 55
- Replicating the setup 56
- HP Client Manager Software 58
- HP SoftPaq Download Manager 59
- System Software Manager 60
- Proactive Change Notification 60
- Subscriber's Choice 60
- ROM Flash 61
- FailSafe Boot Block ROM 62
- Workstation security 63
- SATA hard disk drive security 64
- Password security 67
- Chassis security 71
- Drive Protection System 73
- ECC fault prediction 73
- Thermal sensors 73
- Dual-state power button 74
- 5 Replacing components 75
- Warnings and cautions 76
- Service considerations 77
- Table 5-1 Static shielding 78
- Grounding the work area 79
- Cables and connectors 80
- Customer self-repair 81
- Component locations 83
- Predisassembly procedures 86
- Disassembly order 87
- Cable lock (optional) 87
- Side access panel 89
- Removing the front bezel 94
- Installing the front bezel 94
- Power button assembly 98
- Workstation speaker 108
- Power supply 109
- Power connections 110
- Fan assemblies 111
- Airflow guide 121
- Installing the airflow guide 122
- DIMM installation guidelines 127
- DIMM installation order 127
- Supported DIMM configurations 128
- BIOS errors and warnings 128
- Removing a DIMM 129
- Installing a DIMM 130
- Table 5-6 PCI slots 132
- Expansion card 135
- Installing an expansion card 138
- Removing the battery 139
- Hard disk drive 140
- Liquid cooling solution 145
- CPU heatsink 165
- Installing the CPU heatsink 166
- Removing a CPU 168
- Installing a CPU 169
- System board 170
- Installing the system board 171
- Product recycling 174
- ENWW 163 175
- Calling technical support 176
- Locating ID labels 176
- Locating warranty information 177
- Diagnosis guidelines 179
- Diagnosis during operation 180
- Troubleshooting checklist 181
- E-support 182
- Helpful hints 183
- Solving minor problems 184
- Solving power supply problems 186
- Testing power supply 187
- Solving diskette problems 188
- Solving hard drive problems 190
- Solving display problems 192
- Solving audio problems 194
- Solving printer problems 195
- Overview 196
- User interface 200
- Test tab 202
- Status tab 204
- History tab 204
- Errors tab 204
- Help tab 205
- Diagnostic codes and errors 206
- LED color definitions 210
- POST error messages 212
- 7 Configuring RAID devices 218
- Configuring SATA RAID devices 219
- Configuring system BIOS 220
- Creating RAID volumes 221
- Configuring SAS RAID devices 222
- SAS RAID 0 configuration 223
- SAS RAID 1 configuration 224
- SAS RAID 1E configuration 225
- Deleting RAID volumes 226
- ENWW 215 227
- Resetting the password jumper 229
- Using the CMOS Button 230
- A Connector pins 232
- ENWW 221 233
- ENWW 223 235
- ENWW 225 237
- ENWW 227 239
- ENWW 229 241
- B System board designators 242
- ENWW 231 243
- CRoutine Care 244
- Cleaning the monitor 245
- Cleaning the mouse 245
- D Locating HP resources 246
- Product information 247
- Product support 248
- Product documentation 249
- Product diagnostics 250
- Product updates 251
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