Service manual

6
The boot processor prints the ETF line and the second BPD line of
the self-test display. If none of the processors is successfully selected
as the boot processor, no self-test results are displayed and the console
hangs. You can identify this hung state by examining the LEDs on the
processor modules (see Section 3.7). All yellow LEDs will be OFF. The
group of six red LEDS will flash two alternate patterns, and in one
pattern only the bottom light will be ON.
You can force a processor to become the boot processor so that it will
display self-test results by typing the following:
>>n
where n is the CPU to become the boot processor.
7
The boot processor tests the DWMBB if one is present. Test results are
indicated on the lines labeled XBI on the self-test display. A plus sign
(+) at the right means that the adapter test passed; a minus sign (–)
means that the test failed.
<REFERENCE>(xyp) Scalar Processor 3–15