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4. For the fourth level of diagnostics, LEDs on major system components
indicate the component causing the error.
As the processor-board assembly is not visible during normal operation, a light
path diagnostics button has been incorporated into it to assist with diagnosing
errors. You can light up the LEDs for a maximum of 2 minutes. After that time, the
circuit that powers the lights is exhausted.
The pop-out panel (Figure 1-14 on page 25) also has a remind button. This
places the front panel system-error LED into remind mode, which means it
flashes briefly every 2 seconds. By pressing the button, you acknowledge the
failure but indicate that you will not take immediate action. If a new failure occurs,
the system-error LED will turn on again and no longer blink. The system-error
LED remains in the remind mode until one of the following situations occurs:
All known problems are resolved
The system is restarted
A new problem occurs, at which time it then is illuminated continuously
Tip: The remind button on the pop-out LPD panel does not function when AC
power has been removed from the system. The button is just used to
acknowledge a system error as described above.
1.11 Remote Supervisor Adapter
The x450 includes a Remote Supervisor Adapter (RSA), which is positioned
horizontally in a dedicated PCI slot beneath the PCI-X adapter area of the
system.
Rear of x450
Figure 1-15 Remote Supervisor Adapter connectors
IBM ^ xSeries 450 Planning and Installation Guide
26
External power
ASM interconnect
supply
(RS-485) port
Error LED
Power LED
(amber)
(green)
10/100
Ethernet port
Management
COM port
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