HP Z8 G4 Maintenance And Service Guide

Blank screen and the power LED ashes Red six times, once every second, followed by a two second pause, and the computer beeps six
times. (Beeps stop after fth iteration but LEDs continue ashing.)
Cause Solution
Pre-video graphics error. 1. Reseat the graphics card. Power on the system.
2. Replace the graphics card.
3. Replace the system board.
Blank screen and the power LED ashes Red seven times, once every second, followed by a two second pause, and the computer beeps
seven times. (Beeps stop after fth iteration but LEDs continue ashing.)
Cause Solution
System board failure (ROM detected failure prior to video). Replace the system board.
Monitor does not function properly when used with energy saver features.
Cause Solution
Monitor without energy saver capabilities is being used with energy
saver features enabled.
Disable monitor energy saver feature.
Dim characters.
Cause Solution
The brightness and contrast controls are not set properly. Adjust the monitor brightness and contrast controls.
Blurry video or requested resolution cannot be set.
Cause Solution
If the graphics controller was upgraded, the correct graphics drivers
may not be loaded.
Download the latest graphics drivers from hp.com.
Monitor is not capable of displaying requested resolution. Change requested resolution.
Graphics card is bad. Replace the graphics card.
The picture is broken up, rolls, jitters, or ashes.
Cause Solution
The monitor connections may be incomplete or the monitor may be
incorrectly adjusted.
1. Be sure the monitor cable is securely connected to
the computer.
2. In a two-monitor system or if another monitor is in close
proximity, be sure the monitors are not interfering with each
other’s electromagnetic eld by moving them apart.
58 Chapter 6 Troubleshooting without diagnostics

HP Z8 G4 Specifications

General

Display included	No
Keyboard included	Yes
Power supply	1125 W
Operating system architecture	64-bit
Audio chip	Realtek ALC221
Product type	Workstation
Market positioning	Business
Motherboard chipset	Intel C622
Chassis type	Tower
Product color	Black
Country of origin	China
Number of 3.5\" bays	4
Number of 5.25\" bays	2
PCI Express x8 slots	3
Headphone outputs	1
HDMI ports quantity	0
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	8
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
HDD speed	7200 RPM
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD Super Multi
Card reader integrated	-
Total storage capacity	1000 GB
Memory slots	24x DIMM
Internal memory	8 GB
Memory channels	Hepta-channel
Memory clock speed	2666 MHz
Internal memory type	DDR4-SDRAM
Maximum internal memory	- GB
Memory layout (slots x size)	1 x 8 GB
Tcase	77 °C
Stepping	U0
Processor cache	11 MB
Processor model	4108
System bus rate	- GT/s
Processor socket	LGA 3647 (Socket P)
Processor threads	16
Processor codename	Skylake
Processor frequency	1.8 GHz
Processor cache type	L3
Processor lithography	14 nm
Processor manufacturer	Intel
PCI Express slots version	3.0
Processor boost frequency	3 GHz
Thermal Design Power (TDP)	85 W
Maximum number of PCI Express lanes	48
Memory clock speeds supported by processor	2400 MHz
Maximum internal memory supported by processor	768 GB
Scalability	2S
Processor code	SR3GJ
Processor ARK ID	123544
Intel TSX-NI version	1.00
Processor package size	76.0 x 56.5 mm
Supported instruction sets	AVX, AVX 2.0, AVX-512, SSE4.2

Weight and Dimensions

Depth	551.2 mm
Width	215.9 mm
Height	444.5 mm
Weight	22400 g