HP Z220 SFF, Z220 CMT, Z420, Z620, and Z820 Workstations Maintenance and Service Guide

LED color definitions
The following table describes what each LED light on the computer front panel signifies.
LED state LED color System status
Solid Blue System is on.
Flashing Blue System is in Standby.
Solid or flashing Red System has experienced an error. (See
POST error
messages on page 148.)
None No light System is in Hibernate, or is off.
POST error messages
The Power-On Self Text (POST) is a series of diagnostic tests that runs automatically when the
computer 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 computer system is functioning
properly:
●
Keyboard
●
DIMMs
●
Diskette drives
●
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
102—System Board Failure Potential system board problem; contact HP Support.
110—Out of memory space
for option ROMs
Option ROM for a device could not
run because of memory constraints.
Run Computer Setup (F10) Utility to disable
unneeded option ROMs, and to enable ACPI/USB
Buffers at Top of Memory.
161—Real-Time Clock Power
Loss
1. Run Computer Setup (F10) utility and set default
settings.
2. Replace the CMOS battery.
3. Replace the system board.
162—Systems Options Error 1. Run Computer Setup (F10) utility and set default
settings.
2. Replace the CMOS battery.
148 Chapter 4 Diagnostics and troubleshooting