HP Z Series User Manual

Table 7-1 POST numeric codes and text messages (continued)
Control panel message Description Recommended action
500–BIOS Recovery A system BIOS recovery has occurred. Not applicable.
70x-Wireless Mode Not Supported The system has detected a wireless
module installed in the system that is not
supported and has been disabled.
Replace with a supported module.
800-Keyboard Error Keyboard failure. 1. Reconnect keyboard with computer
turned off.
2. Check connector for bent or
missing pins.
3. Be sure that none of the keys are
depressed.
4. Replace keyboard.
801-Keyboard or System Unit Error Keyboard failure. 1. Reconnect the keyboard with
computer turned off.
2. Be sure that none of the keys are
depressed.
3. Replace the keyboard.
4. Replace the system board.
900-CPU Fan Not Detected CPU fan is not connected or may have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
901-Chassis, Rear Chassis, Front
Chassis, or PCIe blower Fan not
Detected
Fan is not connected or might have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
904-SATA Cabling Error One or more SATA devices are
improperly attached. For optimal
performance, the SATA 0 and SATA 1
ports should be used for hard drives
before other ports.
Ensure SATA connectors are used in
ascending order. For one device, use
SATA 0. For two devices, use SATA 0 and
SATA 1. For three devices, use SATA 0,
SATA 1, and SATA 2.
90B-Fan Failure The system has detected that a cooling
fan is not operating correctly.
1. Reseat fan.
2. Reseat fan.cable.
3. Replace fan.
90D-System Temperature Thermal shutdown occurred. The system
BIOS has detected your machine
was previously shut down to avoid
overheating. Overheating may occur
if the cooling vents are blocked or
the operating temperature exceeds the
system specifications. The machine
should return to normal operation once
the situation is resolved.
Make sure system has proper airflow.
90E-Power Supply Fan Not detected Power supply fan is not connected or
may have malfunctioned.
1. Reseat power supply fan.
2. Reseat fan cable.
3. Replace power supply fan.
80 Chapter 7 POST error messages

HP Z Series Specifications

General

Brand	HP
Model	Z Series
Category	Desktop
Language	English