Troubleshooting Guide

A–2 www.hp.com Troubleshooting Guide
POST Error Messages
POST Numeric Codes and Text Messages
This section covers those POST errors that have numeric codes
associated with them. The section also includes some text messages
that may be encountered during POST.
✎
The computer will beep once after a POST text message is displayed
on the screen.
Numeric Codes and Text Messages
Code/Message Probable Cause Recommended Action
BIOS ROM
checksum
error–System halted
The checksum of the
BIOS code in the BIOS
chip is incorrect,
indicating that the BIOS
code may have become
corrupt.
Contact your system dealer to replace the
BIOS.
CMOS battery
failed
The CMOS battery is no
longer functional.
Contact your system dealer for a
replacement battery.
CMOS checksum
error—Defaults
loaded
Checksum of CMOS is
incorrect, so the system
loads the default
equipment configuration.
A checksum error may
indicate that CMOS has
become corrupt. A weak
battery may have caused
this error.
Check the battery and replace, if
necessary.
CPU at nnnn Displays the running
speed of the CPU.
None.
Press ESC to skip
memory test
The user may press Esc. to skip the full
memory test.
HARD DISK INSTALL
FAILURE
Cannot find or initialize
the hard drive controller
or the drive.
Make sure the controller is installed
correctly. If no hard drives are installed,
be sure the Hard Drive selection in Setup
is set to NONE.