DEC Digital Alpha VME 4/224 User Manual page 64

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If all SROM and flash ROM-based diagnostics pass, and an auto_action boot
command has been set, the >>> console prompt appears on the console terminal
and the dot matrix display will display a ''rotating bar.''
Note that a problem in the PMC I/O companion card that hangs the PCI bus
signal lines could cause diagnostics to report problems throughout the I/O
subsystem and in the PCI controller of the processor chip. If you have a PMC I/O
companion card installed and you are experiencing diagnostic failures, remove it
and repeat the POST.
It is important to remember that the dot matrix display is useable by operating
system software and by user applications as well. Once the system is booted, the
dot matrix display is no longer under control of the console code and may change.
The console will automatically clear the display before booting any image.
Table 2–13 lists symptoms and corrective actions that can be used for
troubleshooting the Digital Alpha VME 4 modules. Refer to the Troubleshooting
chapter of this manual for more information about troubleshooting procedures.
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See Table 3–2
2–30 Installation Procedures