HP Dx5150 - Compaq Business Desktop Troubleshooting Manual page 68

POST Error Messages
Numeric Codes and Text Messages (Continued)
Code/Message
Warning: CPU fan
has failed.
Warning: System
Fan has failed.
Memory is running
at Single Channel
Mode
A–4
Probable Cause
CPU Fan weak (RPM <
1000) or not turning.
System Fan weak (RPM <
1000) or not turning.
When two same size
memories are put in slot
1 and 3, this message
will be displayed.
www.hp.com
Recommended Action
Ensure that the CPU fan power cable is
connected. If the problem persists, contact
an authorized service center for
assistance.
Ensure that the System fan power cable is
connected. If the problem persists, contact
an authorized service center for
assistance.
For optimal performance, shut down the
system and move the second DIMM from
the XMM3 to the XMM2 socket.
Troubleshooting Guide