HP A7818-IE002 - Manual (Page 78)

Tests And Error Messages
MaxiLife Test Sequence And Error Messages
Chapter 4 78
MaxiLife Test Sequence And Error Messages
When you turn on the workstation, the system initiates the normal startup sequence,
which consists of the following steps:
• Basic preboot diagnostics
• BIOS launch
• POST phase
• Operating system boot phase
If the system detects any errors during the startup sequence, MaxiLife won’t necessarily
freeze the system. However, some critical hardware errors are fatal to the system and
prevent the system from starting. (For example, CPU socket and power supply
malfunctions can prevent the system from working.)
The system detects non-crucial errors both during preboot diagnostics and POST, in
which the BIOS boot process returns an error code. The system detects some errors only
during POST sequence; these errors produce the same process.
Finally, while the workstation is working, the system can report fan and temperature
controls. (For example, the system can report a fan error if a fan cable is disconnected.)
This type of error disappears as soon as you fix the problem (for example, reconnect the
fan cable).
The next sections describe the different diagnostics.
Basic Pre-boot Diagnostics
The first diagnostic, called basic preboot diagnostics, runs to check the presence of the
processors or terminators, power supply, hardware monitoring, and thermal sensors. If
you have a power cord connected to the workstation, the basic preboot diagnostics are
activated.
The preboot diagnostic tests run in order of priority, according to their importance to
computer functions.