56 Chapter 2
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Instrument Hangs at the Agilent Splash Screen
A problem of the instrument hanging at the Agilent splash screen could be caused
by many different things. It could be due to a down power supply, a processor
hardware problem, an instrument boot-up process error, etc.
1. Remove the AC power cord and then remove the instrument cover. Refer to
Chapter 13, “Assembly Replacement Procedures,” on page 225 in this manual.
2. Remove the MP7 Top Brace. Refer to Chapter 13, “Assembly Replacement
Procedures,” on page 225 in this manual.
3. With the AC power applied and the On/Off button turned on, verify that all of
the power supply voltages are at their proper level. This can easily be done by
viewing the power supply LEDs on the back side of the A6 Midplane board.
See “A6 Midplane Assembly Troubleshooting” on page 171 of this manual.
Are all of the power supply voltages at the proper level?
If yes:
After verifying that the connections from the A6 Midplane board to the A3
CPU board are not at fault, replace the A3 CPU board.
If no:
After verifying that the connections between the A6 Power Supply, the A6
Midplane board, and the A7 Motherboard are all mechanically and
electrically secure, replace the A5 Power Supply assembly.
PCI Enumeration Error
When the instrument is first booting up it runs some BIOS level self tests, one of
which is that of the devices on the PCI bus. If there is a problem with a device on
the PCI bus a “PCI enumeration” error may be seen on the boot screen. Since the
only assembly connected to the PCI bus, other than the A3 CPU board, is the A2
Digital IF assembly, try removing this assembly and rebooting the instrument to
see if the error goes away. Of course, you will have other error messages due to
this assembly being missing, but this will allow you to isolate this particular error.
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