HP Z800 Owners Manual

							System board
This section describes replacing the system board.
Removing the system board
1.Disconnect power from the workstation (see Predisassembly procedures on page 73).
2.Remove the side access panel (see 
Removing the side access panel on page 75).
3.Remove the expansion card support (see 
Removing the expansion card support on page 77).
4.Remove the airflow guide (see 
Removing the airflow guide on page 76).
5.Remove the memory fan assembly (see 
Removing the memory fans on page 136).
6.Remove the front system fan assembly (see 
Removing the expansion card guide/front fan
holder on page 126).
7.Remove expansion boards and graphics cards (see 
Removing a PCIe card on page 147, Removing
a PCI card on page 150).
TIP:Make a note of the cable connections before disconnecting them from the system board.
For more information, refer to 
Power connectionson page 84.
8.Disconnect all cabling from the system board.
9.Prepare the chassis for system board removal.
a.Move the optical drives out of the chassis far enough to clear the system board (see 
Removing
an optical disk drive from the optical drive bay on page 94).
Place the optical drive cables in the bottom optical drive bay.
The following figure presents an example of these steps.
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							b.Place the graphics cables in the hard drive bays.
Place the CPU, memory power, and rear system fan cables over the chassis edge.
TIP:Use the CPU and memory power cables to hold up the shorter rear system fan cable.
The following figure presents an example of these steps.
10.Slide the system board forward as shown in the following figure .
Figure 5-104  Removing the system board
11.Using the CPU heatsinks as handles, lift the system board straight up and then tilt the board to
remove it from the chassis 
2. Do not damage the cables and rear panel connectors.
NOTE:If desired, remove system board components such as the CPU heatsinks and the CPUs.
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							Installing the system board
TIP:For convenience, you may install the CPUs and the CPU heatsinks before installing the system
board in the chassis.
1.Ensure that all cables are clear of the bottom of the chassis (see Removing the system board
on page 159).
2.Tilt the system board and lower it into the chassis, ensuring that all standoffs engage the chassis
keyholes.
Ensure that the system board connectors engage correctly with the rear I/O panel.
3.Push back on the board while maintaining downward pressure on the board so all standoffs remain
engaged.
CAUTION:Do not pinch any power or data cables.
4.Lift the system board corners to make sure the board is engaged properly.
5.Reinstall all removed components (in the reverse order of the section above) and reconnect any
cables that have been disconnected.
To identify power cables, see 
Power connections on page 84.
See the removing and installing sections of this chapter for details on reinstalling component
cables.
Battery
This section describes how to remove and install the battery.
The battery that comes with the workstation provides power to the real-time clock and has a minimum
lifetime of about three years.
WARNING! This workstation includes a lithium battery. There is a risk of fire and chemical burn if the
battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in
water or fire, or expose it to temperatures higher than 60°C (140°F).
CAUTION:Before removing the battery, back up the CMOS settings in case they are lost when the
battery is removed. To back up the CMOS settings, select the Save to Diskette option in the Computer
Setup (F10) Utility.
NOTE:Do not dispose of batteries, battery packs, and accumulators with general household waste.
Removing the battery
1.Disconnect power from the workstation (see Predisassembly procedures on page 73).
2.Remove the side access panel (see 
Removing the side access panel on page 75).
3.Remove the expansion card support (see 
Removing the expansion card support on page 77).
4.On the system board, press the release tab of the battery holder. (See 
Component locations
on page 70 or the Side access panel service label to locate the battery.)
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							5.Rotate the battery enough to get beyond the latch, and then lift it straight up as shown in the
following figure.
Figure 5-105  Removing the battery
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							Installing the battery
1.Confirm the polarity (positive or negative) of the battery to position it correctly in the battery holder.
2.Place the battery edge under the plastic housing tab and press gently until it snaps into place.
3.Reinstall all removed components and reconnect any cables that have been disconnected.
Product recycling
HP encourages customers to recycle used electronic hardware, HP original print cartridges, and
rechargeable batteries.
For information about recycling HP components or products, see 
http://www.hp.com/go/recycle.
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							6 Diagnostics and troubleshooting
This chapter describes the tools available for diagnosing and troubleshooting system issues, and
includes these topics:
Topics
Calling technical support on page 165
Locating ID labels on page 165
Locating warranty information on page 166
Diagnosis guidelines on page 167
Troubleshooting checklist on page 168
HP troubleshooting resources and tools on page 170
HP troubleshooting resources and tools on page 170
HP troubleshooting resources and tools on page 170
Troubleshooting scenarios and solutions on page 173
Self-troubleshooting with HP Vision Field Diagnostics on page 183
Diagnostic codes and errors on page 191
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							Calling technical support
At times you might encounter an issue that requires technical support. When you call technical support:
●Have the workstation readily accessible.
●Write down the workstation serial numbers, product numbers, model names, and model numbers
and have them in front of you.
●Note any applicable error messages.
●Note any add-on options.
●Note the operating system.
●Note any third-party hardware or software.
●Note the details of any blinking LEDs on the front of the workstation.
●Note the applications you were using when you encountered the problem.
●Note the power supply BIST status, if applicable.
NOTE:When calling in for service or support, you might be asked for the Product Number (example:
PS988AV) of the workstation. If the workstation has a Product Number, it is generally located next to
the 10- or 12-digit Serial Number of the workstation.
NOTE:On most models, the serial number and product number labels can be found on the top panel
or side of the workstation and at the rear of the workstation.
For a listing of all worldwide technical support phone numbers, visit http://www.hp.com/support, select
your region, and click Contact HP in the upper-left corner.
Locating ID labels
To assist in troubleshooting, product, serial, and authentication numbers are available on each
workstation.
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							Each HP Workstation has two unique serial number labels  and a Certificate of Authentication (COA)
label 
2 as shown in the figure below.
Figure 6-1  Workstation label locations
In general, the serial number labels can be found on the top panel or on the side of the workstation and
at the rear of the workstation (your workstation may look different). Keep this number available when
contacting customer service for assistance.
A product number is generally located next to the serial number.
The COA is used for Windows-preinstalled systems only, and is generally located on the top panel or
side of the workstation near the serial number label. On some workstations it is located on the bottom
of the workstation.
Locating warranty information
To locate base warranty information, visit http://www.hp.com/support/warranty-lookuptool or refer to
the Documentation and Diagnostics CD that shipped with your workstation.
To locate an existing Care Pack, visit 
http://www.hp.com/go/lookuptool.
To extend a standard product warranty, visit 
http://www.hp.com/hps/carepack. HP Care Pack Services
offer upgraded service levels to extend and expand a standard product warranty.
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							Diagnosis guidelines
If you encounter a problem with the workstation, monitor, or software, the following sections provide a
list of general suggestions that help you isolate and focus on the problem before taking further action.
Diagnosis at startup
●Verify that the workstation and monitor are plugged into a working electrical outlet.
●Remove all diskettes, CDs, or USB drive keys from your system before turning it on.
●Verify that the workstation is turned on and the green power light is on.
●If you have installed an operating system other than the factory-installed operating system, check
to be sure that it is supported on your system by visiting 
http://www.hp.com/go/quickspecs.
●Verify that the monitor is turned on and the green monitor light is on. Note that not all monitors are
equipped with LED lights to indicate their functionality.
●Turn up the brightness and contrast controls of the monitor if the monitor is dim.
●If the workstation has multiple video sources and only a single monitor, the monitor must be
connected to the primary display adapter. During startup, the other monitor connectors are
disabled; if the monitor is connected to one of these ports, it will not function after Power-on Self
Test (POST). You can select the default VGA source in Computer Setup (F10).
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							Diagnosis during operation
●Look for blinking LEDs on the front of the workstation. The blinking lights are error codes that will
help you diagnose the problem. Refer to the 
Diagnostic LED and audible (beep) codes
on page 191 section of this document for information on interpreting diagnostic lights and audible
codes.
●Press and hold any key. If the system beeps, then your keyboard is operating correctly.
●Check all cables for loose or incorrect connections.
●Wake the workstation by pressing any key on the keyboard or the power button. If the system
remains in suspend mode, shut down the system by pressing and holding the power button for at
least four seconds, then press the power button again to restart the system. If the system does not
shut down, unplug the power cord, wait a few seconds, then plug it in again. If it does not restart,
press the power button to start the workstation.
●Reconfigure the workstation after installing a non–plug and play expansion board or other option.
●Be sure that all required device drivers have been installed. For example, if you have connected
a printer, you must install a printer driver.
●If you are working on a network, plug another workstation with a different cable into the network
connection. There might be a problem with the network plug or cable.
●If you recently added new hardware, remove the hardware and verify if the workstation functions
properly.
●If you recently installed new software, uninstall the software and verify if the workstation functions
properly.
●If the screen is blank, plug the monitor into a different video port on the workstation if one is
available. Alternatively, replace the monitor with a monitor that you know is working properly.
●Upgrade the BIOS. A new release of the BIOS might have been released that supports new features
or fixes your problem.
●For more detailed information, see the troubleshooting chapter in the Maintenance and Service
Guide at 
http://www.hp.com/support/workstation_manuals.
Troubleshooting checklist
Before running diagnostic utilities, use the following checklist to find possible solutions for workstation
or software problems.
●Is the workstation and monitor connected to a working electrical outlet?
●Is the workstation powered on?
●Is the green power light illuminated?
●Is the monitor on?
●Is the green monitor light illuminated?
●If the monitor is dim, adjust the monitor brightness and contrast controls.
●Press and hold any key. If the system beeps, the keyboard is operating correctly.
●Check cables for loose or improper connections.
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