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CJ
Chapter 2 - Basic Component Set-up
25
edge of the CPU board. The length of this test will vary, depending on the
number of memory boards installed in the system, but will always finish in less
than 2 minutes. Results of this self-test are contained in the following table; a
solid circle means the light is on; a hollow circle means the light is off. Also, left
to right in the table is equivalent to reading the LEDs from top to bottom when
the CPU board is in its slot.
If at some point in the above sequence, the LEDs freeze (keep the same pattern
for more than 2 minutes), or the sequence restarts from the beginning, there is a
critical hardware problem with the workstation. The appropriate thing to do in
this case is to contact Sun Microsystems Field Service or your local Field Service
organization. Copy down the pattern oflights (as well as you can, if it is repeat-
ing over and over); they contain important diagnostic information for Field Ser-
vice.
Revision A of 10 October 1986
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