HP P Class 450/500/550/600/650/700/750 Reference Manual page 96

Tests and Error Messages
MaxiLife Test Sequence and Error Messages
The following table shows the test sequence carried out, the type of error message, and the
action to take.
Table 5-1. Basic Pre-boot Diagnostics
Test
Presence of either CPU or
Terminator in the processor slot.
Control of some voltages: VRMs, 12V
Test of the correct power signals to
the CPU. The power supply may be
OK, whereas the VRM is not.
Check the system board clock
generators (PLL).
Number of installed DIMMs
Compatibility of DIMMs. The BIOS
checks that the inserted DIMMs are
both compatible with one another,
and compatible with the Front Side
Bus frequency.
Availability of video controller. It is
checked by the BIOS. If an error is
detected, it is not a fatal one and the
BIOS will continue its execution
normally.
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Error Code
CPU SOCKET Check CPUs and Terminator and VRM of installed
processor.
POWER SUPPLY Check the power supply connectors, VRM, CPU. In
a single processor system, check that no VRM is
plugged into the VRM connector.
The error message could also show: Power CPU1
and Power CPU2.
POWER Check that the processor and terminator are
correctly installed.
Check the power supply connectors, VRM, CPU. In
a single processor system, check that no VRM is
plugged into the VRM connector.
Check or replace the VRM.
Check the power supply unit connectors.
BOARD PLL Check the power supply connector.
Replace the system board (PLL clock generator).
NO RAM Check that the memory module is correctly
installed in the memory socket.
RAM TYPE Check the installed memory modules. This error
occurs when mixing incompatible memory
modules, or when mixing Unbuffered and
Registered memory modules.
NO VIDEO Check that the video controller is correctly
installed.
Note: No error is detected if a monitor is not
connected to an installed video controller. This is
not a fatal error and the BIOS will continue its
normal execution.
Action to Take
Chapter 5