Z400 Host Computer Troubleshooting

1 Overview

The follow information assists in confirming if the HP Z400 Host Computer is experiencing a hardware fault. Although the following is not a complete set of diagnostics, it should be sufficient in determining if the Z400 Host Computer is suffering from hardware issues at the prescribed Field Replaceable Unit (FRU) level.

Obtain complete diagnostic details for the HP Z400 Host Computer from Hewlett Packard’s support web site: http://welcome.hp.com/country/us/en/support.html

Search by Host Computer model number and download the appropriate Technical Reference Guide.

note:

HP also supplies a software diagnostic CD-ROM (HP Insight Diagnostics) to use to confirm that the Host Computer failed. Please note that these diagnostics only test the base hardware configuration (systemboard, memory, etc.) of the Z400 Host Computer. Add-in cards (Graphics, Ethernet, SCSI Controller, etc.) are not tested.

danger

ELECTROCUTION HAZARD
there is power to the system board even when the Host Computer is powered down.
per PROPER LOCKOUT / TAGOUT PROCEDURES, Disconnect AC power from the Host Computer before reseating or replacing components.

2 General Troubleshooting Checklist

Before proceeding with the rest of this procedure, use the following checklist to find possible solutions for Host Computer problems:

Is the Host Computer PSU powered on?
Are the Host Computer and Monitors connected to the proper and working electrical outlet?

- Is the front panel green power light illuminated?

- Has Circuit Breaker #2 (CB2) tripped on Power Distribution Box?
Adjust the monitor brightness and contrast controls if the monitor is dim.
Examine all cables for loose or incorrect connections.
Remove all media from the drives before you power on the system.
Are you running the latest BIOS version and have correct BIOS Settings?

3 LEDS

3.1 Power LED (Z400 Front Panel)

The Power LED in the Power On/Off button has the following states:

Activity	Possible cause	Recommended action
Blue Power LED* on. No beeps.	Workstation on.	NA
Blue Power LED* blinks every two seconds.* No beeps.	Workstation in Sleep mode (S3-Suspend to RAM). Select models only.	Check BIOS Settings. Should be disabled
Blue Power LED* is off.* No beeps.	Workstation in Hibernate mode (S4-Suspend to disk).	Check BIOS Settings. Should be disabled
Blue Power LED* blinks three times, once per second. No beeps.	Workstation in Sleep mode (S3-Suspend to RAM). Select models only.	Check BIOS Settings. Should be disabled
Blue Power LED* blinks four times, once per second. No beeps.	Workstation in Hibernate mode (S4-Suspend to disk).	Check BIOS Settings. Should be disabled
Red Power LED blinks two times, once every second, followed by a two-second pause. Two beeps.	CPU thermal protection activated by either of the following methods: A fan might be blocked or not turning. The heatsink and fan assembly is not properly attached to the CPU.	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. Ensure that the workstation air vents are not blocked and the cooling fan is running. Open the access panel, press power button, and verify that the CPU fan is spinning. If the CPU fan is not spinning, make sure the fan cable is plugged into the workstation board header. Ensure the fan is fully and properly seated or installed. If fan is plugged in and seated properly, but is not spinning, the problem might be in the CPU fan. Contact HP for assistance. Verify that the fan assembly is properly attached. If problems persist, there might be a problem with the CPU heatsink. Contact HP for assistance.
Red Power LED blinks three times, once every second, followed by a two-second pause. Three beeps.	CPU not installed (not an indicator of bad CPU).	Verify that the CPU is present. Reseat the CPU.
Red Power LED blinks four times, once every second, followed by a two-second pause. Four beeps.	Power failure (power supply is overloaded)	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. Open the access panel and ensure that all power connections (24- pin Main, 4-pin CPU) are secure on the system board. Check if a device is causing the problem by removing all attached devices (such as hard, diskette, or optical disk drives, and expansion cards.) Power on the workstation. If the system enters the POST, power off and replace one device at a time; repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. Check the power supply functionality. Disconnect the AC power. Disconnect ALL internal power supply cables. Plug in the AC power. If the power supply fan spins and the BIST LED lights, the power supply is functional. The problem might be on the system board. Replace Host Computer. If the power supply fan does not spin or the BIST LED does not light, the problem might be in the power supply. Replace Host Computer.
Red Power LED blinks five times, once every second, followed by a two-second pause. Five beeps.	Pre-video memory error	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. Reseat DIMMs. Replace DIMMs one at a time to isolate faulty module. Replace third-party memory with HP memory. The problem might be on the system board. Replace Host Computer.
Red Power LED blinks six times, once every second, followed by a two-second pause. Six beeps.	Pre-video graphics error.	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. Reseat the graphics card. The problem might be on the graphics card. Replace Host Computer.
Red Power LED blinks seven times, once every second, followed by a two second pause. Seven beeps.	System board failure (ROM detected failure prior to video).	Clear CMOS. NOTE: Refer to the Z400 Host PC BIOS Set up procedure for detailed information on clearing CMOS. The problem might be on the system board. Replace Host Computer
Red Power LED blinks eight times, once every second, followed by a two-second pause. Eight beeps.	Invalid ROM based on bad checksum.	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. Clear CMOS. NOTE: Refer to the Z400 Host PC BIOS Set up procedure for detailed information on clearing CMOS. Flash BIOS ROM The problem might be on the system board. Replace Host Computer.
Red Power LED blinks nine times, once every second, followed by a two-second pause. Nine beeps.	System powers on but does not start.	The problem might be on the system board. Replace Host Computer. The problem might be in the CPU. Replace Host Computer.
System does not power-on and LEDs are not blinking. No beeps.	System unable to power on.	CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. To resolve the problem, choose one of the following options: Press and hold the power button for less than 4 seconds. If the hard disk drive LED turns green, then: Remove the expansion cards one at a time and try holding the power button again for less than 4 seconds. The problem might be on the system board. Replace Host Computer. Press and hold the power button for less than 4 seconds. If the hard disk drive LED does not turn on green then: Check that unit is plugged into a working AC outlet. Open the access panel and check that the power button harness is properly connected to the system board. Check that all power supply cables are properly connected to the system board. Check the power supply functionality. Disconnect the AC power. Disconnect all internal power supply cables. Plug in the AC power. If the power supply fan spins and the BIST LED lights, the power supply is functional. The problem might be on the system board. Replace Host Computer. If the power supply fan does not spin or the BIST LED does not light, the problem might be in the power supply. Replace Host Computer.

3.2 Hard Drive Activity LED

The Disk Activity LED below and to the left of the Power On/Off button flickers whenever the system is accessing either hard drive.

3.3 Network Activity LEDs

The network activity LEDs at the rear of the Host Computer chassis (including both the onboard network port and the Quad Port GBe card ports) flicker whenever there is network activity on that port. These LEDs remain a solid light as long as the system is plugged into AC power with the power switch on and connected to other live Ethernet ports.

4 HP Z400 Adavance Error Reporting (POST)

The Power-On Self Text (POST) is a series of diagnostic tests that runs automatically when the workstation is powered on. Audible and visual messages occur before the operating system starts if the POST encounters a problem. POST checks the following items to ensure that the workstation system is functioning properly:

Keyboard
DIMMs
All mass storage devices
CPUs
Controllers
Fans
Temperature sensors
Cables (front/rear panels, audio, and USB ports)

The table shown next describes the POST error messages.

Screen message	Probable cause	Recommended action
101—Option ROM Checksum Error	System ROM checksum.	Verify the you have the correct BIOS ROM Code: Flash the ROM, if needed. If an expansion card was recently added, remove it to find out if the problem remains. Clear CMOS. If the message disappears, there might be a problem with the expansion card. Replace Host Computer.
102—System Board Failure	DMA, timers, and so forth, might be set improperly or might be defective.	Clear the CMOS. Remove the expansion boards. Replace Host Computer.
110—Out of memory space for option ROMs	Option ROM for a device could not run because of memory constraints.	Run the Computer Setup (F10) Utility to disable unneeded option ROMs.
162—Systems Options Error
163—Time and Date Not Set	Invalid time or date in configuration memory. RTC battery might need replacement. CMOS jumper might not be properly installed.	Set the date and time from the Computer Setup (F10) Utility. If the problem persists, replace the RTC battery.
164—Memory Size Error	Memory configuration is incorrect.	Run the Computer Setup (F10) Utility Verify that the memory modules are installed properly. If third-party memory has been added, test the memory configuration using HP memory. Verify the memory module type.
201—Memory Error	RAM failure.	Run the Computer Setup (F10) utility. Be sure that memory modules are installed correctly. Verify the memory module type. Remove and replace memory modules one at a time to isolate faulty modules. Replace faulty memory modules. If the error persists after replacing memory modules, replace the Host Computer.
202—Memory Type Mismatch	Memory modules do not match.	Replace the memory modules with matched sets.
203—Memory module failed self-test and failing rank was disabled	Defective memory module.	Replace the memory module.
204—Memory module failed and user rank was disabled	Improper module load.	Reseat the memory module correctly.
205—Memory high temperature detected	Insufficient memory module cooling.	Verify that a memory module cooling fan is installed and operating.
206—Memory setup invalid	Memory configured incorrectly.	Reconfigure the memory modules in the proper slots.
207—Incompatible DIMMs detected	DIMMs are installed that do not fulfill system requirements.	Verify that the memory module type matches workstation requirements. Insert the DIMM in the proper memory socket. Replace the DIMM if the problem persists.
208—Mismatched DIMMs detected	Installed DIMMs are improperly matched.	Verify that matching DIMMs are installed.
209—Memory warning condition detected	Incorrect memory module type in use.	Verify that the memory modules are compatible with workstation requirements.
212—Failed Processor 0	Processor has failed to initialize.	Reseat the processor in its socket. If the processor does not respond, replace Host Computer.
213—Incompatible Memory Modules	A memory module in the memory socket identified in the error message is missing critical SPD information, or is incompatible with the chipset.	Verify the memory module type. Insert the DIMM in another memory socket. Replace the module with a DIMM conforming to the SPD standard.
214—DIMM Configuration Warning	DIMMs are not installed correctly (not paired correctly).	See the service label on the workstation access panel for the correct memory configurations, and reseat the DIMMs accordingly.
215—DIMM Configuration Error
216—Memory Size Exceeds Maximum Supported	The amount of memory installed exceeds that supported by the hardware.	Verify how much memory the workstation supports. Remove the excess memory.
301—Keyboard Error	Keyboard failure.	Reconnect the keyboard with the workstation powered off. Check the connector for bent or missing pins. Be sure that none of the keys are pressed. Replace the keyboard.
303—Keyboard Controller Error	I/O board keyboard controller is defective or is not set properly.	Reconnect the keyboard with the workstation powered off. Connect a keyboard directly to the workstation (instead of through the Console Bulkhead Panel). Replace Host Computer.
304—Keyboard or System Unit Error	Keyboard failure.	Reconnect the keyboard with the workstation powered off. Connect a keyboard directly to the workstation (instead of through the Console Bulkhead Panel). Be sure that none of the keys are pressed. Replace keyboard. Replace Host Computer.
510—Splash Screen image corrupted	Splash Screen image has errors.	Update system BIOS.
511—CPU Fan not detected	Fan is not connected or is defective.	Reseat the fan cable. Reseat the fan. Replace Host Computer.
512—Rear Chassis fan not detected	Rear fan missing, disconnected, or defective.	Reseat the fan cable. Reseat the fan. Replace Host Computer.
513—Front Chassis fan not detected	Front fan missing, disconnected, or defective.	Reseat the fan cable. Reseat the fan. Replace Host Computer.
514—Memory fan not detected	Memory fan missing, disconnected, or defective.	Verify that the memory fan is installed and connected properly. Replace Host Computer.
515—CPU Overtemp occurred	Insufficient processor cooling or processor defect.	If necessary, add a heatsink to the processor and ensure proper operation. Replace Host Computer.
516—Chipset fan not detected	Chipset fan missing, disconnected, or defective.	Ensure that the fan is installed and connected properly. Replace Host Computer.
517—Low power CPU heatsink(s) detected for high power CPUs	Inadequate heatsink is installed.	Replace the low power heatsink with a high power heatsink.
518—Power supply wattage insufficient for hardware configuration	Workstation configuration requires more power than the power supply can provide.	Reduce the workstation power consumption. Replace Host Computer.
601—Diskette Controller Error	Diskette controller circuitry or diskette drive circuitry incorrect.	Run the Computer Setup (F10) utility. Clear CMOS. Replace Host Computer.
605—Diskette Drive Type Error	Mismatch in drive type.	Run the Computer Setup (F10) utility. Clear CMOS. Replace Host Computer.
610—External Storage Device Failure	External storage device is not detected, is improperly connected, or is defective.	Verify that the external device is present and connected properly. Replace the external device.
611—Primary Floppy Port Address Assignment Conflict	The flexible disk drive is configured at a previously assigned address.	Select a new address for the flexible disk drive.
912—Computer Cover Has Been Removed Since Last System Start Up	N/A	No action required.
914— Hood Lock Coil is not Connected	Mechanism is missing or is not connected.	Reconnect or replace the missing mechanism. Reseat or replace the missing mechanism cable.
916—Power Button Not Connected	Power button cable is disconnected from the system board.	Reconnect the cable and restart.
917—Front Audio Not Connected	Front Audio mechanism is missing or is not connected.	Replace or reconnect the missing front audio mechanism to the system board. Reseat or replace the missing mechanism cable.
918—Front USB Not Connected	Front USB mechanism is missing or is not connected.	Replace or reconnect the missing Front USB mechanism to the system board. Reseat or replace the missing mechanism cable.
919—Multi-Bay Riser Not Connected	Multi-Bay riser mechanism is missing or is not connected.	Replace or reconnect the missing Multi-Bay mechanism to the system board. Reseat or replace the missing mechanism cable.
920—Fatal error on QPI link X	Fatal error detected on QPI link x, where x is 0 or 1. This type of error is identified on the line following the error message.	Replace Host Computer.
921—Fatal error on QPI Protocol link X	Fatal error detected in QPI link x protocol, where x is 0 or 1. This type of error is identified on the line following the error message.	Replace Host Computer.
922—Fatal error on PCIe slot X	Fatal error occurred in the designated slot.	Move the card to a different slot. If the problem persists, replace the card.
923—Fatal error on ESI port 0	A fatal error occurred on ESI port 0. slot.	Verify that the ESI port device is connected and working properly.
924—Fatal error on IOH core X	Fatal error detected on IOH core x, where x is 0 or 1. This type of error is identified on the line following.	Replace Host Computer.
925—Fatal error on IOH miscellaneous	Fatal miscellaneous error detected on IOH core x, where x is 0 or 1.	Replace Host Computer.
926—Fatal error on IOH Vtd	Fatal error detected in the Intel Virtualization Technology.	Replace Host Computer.
927—Fatal error on DIMM in slot CPU X DIMM Y	Fatal multibit ECC error detected on the DIMM in the slot labeled CPU x DIMM y (where x is 0 or 1 and y is 1 - 6), as labeled on the system board.	Replace the DIMM in the identified slot.
928—Fatal machine check detected on CPU X		Replace Host Computer.
1720—SMART Hard Drive Detects Imminent Failure	Hard drive is about to fail. (Some hard disk drives have a firmware patch that fixes erroneous error messages.)	Determine if the hard disk drive is giving a correct error message. Back up contents and replace the hard disk drive.
1783—Fixed Disk 0/1 locked	Hard disk drive failure.	Diagnose the hard disk drive, and replace it if necessary.
1796—SATA Cabling Error	Missing or improperly attached cable.	Verify that a cable is attached. Reattach the cable.
1797—SATA Drivelock is not supported in RAID mode	SATA Drivelock is not supported in RAID mode.	Disable RAID mode, or disable SATA drivelock.
1801—Microcode Update Error	Unsupported processor (C0 Stepping or greater only).	The microcode update failed. Check the processor stepping to ensure it is a supported stepping. Replace Host Computer.
1802—Processor Not Supported	The system board does not support the processor.	Replace Host Computer.
1803—Processor feature set is insufficient for current system settings	Processor feature set is insufficient for current system settings. The BIOS settings do not match the support provided by the processor	Change the BIOS settings or upgrade the processors.
1804—A processor feature and the memory configuration are incompatible	A processor feature is incompatible with the memory configuration.	Restore the previous memory configuration.
ERROR: Invalid 1394 GUID (Invalid electronic serial number)	No electronic serial number is stored with the system	To assign a serial number , select Security >System IDs in the Computer Setup (F10) Utility.
ERROR: Invalid electronic serial number (no number)	No electronic serial number is stored with the system	To assign a serial number , select Security >System IDs in the Computer Setup (F10) Utility.
ERROR: An unsupported processor is installed. System halted	Unsupported processor detected.	Replace Host Computer.
ERROR: A processor requiring too much power is installed. System halted	Unsupported processor detected.	Replace Host Computer.
Invalid electronic serial number	Incorrect serial number registered in the system.	Use the Computer Setup (F10) Utility to reset the serial number.
Network Server Mode Active and No Keyboard Attached	Keyboard not detected.	Verify that a functioning keyboard is attached to the workstation.
Processor initialization fails!!!	Processor defective.	Replace Host Computer.