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20 Troubleshooting and Fault Clearing Procedures
Table 3-A Continued
Summary of Fault Symptoms and Potential Solutions
SYMPTOMS
PRIMARY PROCESSOR FAULTS
With the power on, the liquid
crystal display on a SASI
Primary Processor SRU does
not show any messages. The
cabinet's cooling fans are
working.
With the power on, the liquid
crystal display on a SASI
Primary Processor SRU does
not show any messages. The
cabinet's cooling fans are not
working.
MASS STORAGE SRU FAULTS
With the power on and the
tape installed (80-megabyte
versions), the select and fault
indicators on the Mass Storage
SRU do not light.}
With the power on, the liquid
crystal display on a Primary
Processor SRU displays the
message: "Could Not Reset
Disk". (Some versions of
SCSI-type Primary Processor
SRUs do not have displays;
in this case, check for log and
alarm messages.)
Practice 450-1011-501
PROBABLE CAUSES
The Primary Processor SRU is Power the system down and
not properly seated.
The Primary Processor SRU
is defective.
There is a power fault
The Mass Storage SRU is
defective.
The Mass Storage SRU is not
properly seated.
CORRECTIVE ACTIONS
reseat the Primary Processor SRU.
Power the system down and
replace the Primary Processor SRU.
See Power Faults, earlier in this
table.
Power the system down,
replace the Mass Storage SRU, and
reload the system software.
Power the system down and
reseat the Mass Storage SRU.
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