HP Z Series User Manual

Table 7-3 Interpreting POST diagnostic front panel lights and audible codes (continued)
Category Major/minor code Description
System board 5.2 The embedded controller cannot find valid firmware.
5.3 The embedded controller has timed out waiting for the BIOS.
5.4 The embedded controller has timed out waiting for BIOS to return
from system board initialization.
5.5 The embedded controller rebooted the system after a possible
lockup condition had been detected through the use of a
System Health Timer, Automated System Recovery Timer, or
other mechanism.
* Indicates hardware triggered event; all other events are controlled by the BIOS.
Interpreting system validation diagnostic front panel LEDs and audible codes 83

HP Z Series Specifications

General

Series	Z Series
Category	Desktop
Processor	Intel Xeon or Intel Core (depending on the specific model)
Operating System	Windows 10 Pro or Windows 11 Pro
Storage	SSD or HDD options, up to multiple TB
Graphics	NVIDIA Quadro or AMD Radeon Pro
Expansion Slots	Multiple PCIe slots
Ports	USB, DisplayPort, HDMI
Form Factor	Tower
Memory	Up to 256 GB DDR4 ECC or non-ECC SDRAM (depending on the specific model)
Power Supply	Various wattage options, typically 500W to 1000W (depending on the specific model)