HP Z400 User Manual

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.
176 Chapter 6 Diagnostics and troubleshooting ENWW

HP Z400 Specifications

General

Bus type	QPI
Processor cache	4 MB
Processor cores	2
Processor model	W3503
System bus rate	4.8 GT/s
Processor socket	-
Processor frequency	2.4 GHz
Processor cache type	Smart Cache
Processor lithography	45 nm
Processor manufacturer	Intel
PCI Express slots version	2.0
Processor operating modes	64-bit
ECC supported by processor	Yes
Thermal Design Power (TDP)	130 W
Number of processors installed	1
Memory types supported by processor	DDR3-SDRAM
Memory clock speeds supported by processor	800, 1066 MHz
Memory bandwidth supported by processor (max)	25.6 GB/s
Maximum internal memory supported by processor	24 GB
Audio system	Realtek ALC262
Product type	Workstation
Motherboard chipset	Intel® X58 Express
Memory slots	6x DIMM
Internal memory	4 GB
Memory channels	Triple-channel
Memory clock speed	1066 MHz
Memory layout (slots x size)	- GB
Graphics card	Quadro 600
Networking features	Gigabit Ethernet (10/100/1000)
Graphics card family	NVIDIA
HDD speed	- RPM
RAID levels	0, 1, 5, 10
HDD capacity	500 GB
HDD interface	SATA II
Storage media	HDD
Display included	No
USB 2.0 ports quantity	8
Parallel ports quantity	0
Chassis type	Minitower
Country of origin	China
Number of 5.25\" bays	3
Operating system installed	Windows 7 Professional
Operating system architecture	32-bit
Power supply	475 W
Processor ARK ID	40800
Processor package size	42.5 x 45 mm
Supported instruction sets	SSE4.2

Weight and Dimensions

Depth	455.3 mm
Width	167.9 mm
Height	450.2 mm
Weight	13500 g