HP P Class 450/500/550/600/650/700/750 Reference Manual page 95

The first detected error displays a message on the LCD status panel. If this happens, one
of the following screens could appear.
Terminators in the Processor Slots
Control of the CPU Board
CPU Board is not connected,
or the system board needs
replacing.
The following diagram shows how the Pre-boot Diagnostics works when it encounters an
error.
Figure 5-1. How Pre-boot Diagnostics Works When It Encounters An Error
PLL Frequency
Vcc State (5V)
PGOOD (VRM output)
Chapter 5
Presence of CPUs or
Error!
CPU Socket
Missing or
incorrectly
installed CPU
or Termina-
Number and Compatibil-
Error!
Board PLL
No Dimms are
detected.
MaxiLife Firmware
LCD Status
Panel
Error!
CPU Socket
MaxiLife Test Sequence and Error Messages
Control of Some Voltages: VRMs, 12V
Error!
Power supply
VRM or CPU power supply are not connected.
If an Error! Power is displayed, the likely cause
could be that the power supply is not connected,
or the VRM is installed with an unpopulated
CPU socket (unsupported configuration).
ity of DIMMs
Error! Error!
No RAM RAM type
Installed DIMMs
are not compatible.
This is in fact the
BIOS that is
checking the
CPU or Termination Card
Voltage 12V
Voltage CPU1, CPU2
An error has been detected when
checking the CPU and Terminator.
The displayed error message could
indicate a missing CPU or
Tests and Error Messages
Error! Error!
Power CPU 1 Power CPU 2
Video Board
Error!
No Video
Video board is not
installed.
This test is executed by
the BIOS.
SMBus
DIMM 1
DIMM 2
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