DEC DECstation 5000 Model 100 Series Hardware Operator's Manual page 170

Table 10-3 (Cont.). Self-Test Error Messages for the Base System Slot
scc/io The controller for one of the communications connectors, the connector
itself, or a cable attached to the connector is faulty. Make sure that
the cables to all your communications devices are plugged in. Then
turn the system unit off and on. If the message appears again, copy
the entire message and call your system manager or Customer Support
Center.
scc/pins One of the communications connectors is faulty. Copy the entire
message and call your system manager or Customer Support Center.
scc/tx-rx The controller for one of the communications connectors, the connector
itself, or a cable attached to the connector is faulty. Make sure that
the cables to all your communications devices are plugged in. Then
turn the system unit off and on. If the message appears again, copy
the entire message and call your system manager or Customer Support
Center.
scsi/cntl The controller for the built-in SCSI connector in the base system slot
is faulty. Turn the system unit off and on. If the test message appears
again, copy the entire message and call your system manager or
Customer Support Center. Note that you can still use SCSI connectors
in the option slots.
scsi/sdiag A SCSI device connected to the built-in SCSI connector in the base
system slot is faulty, or one of the SCSI cables that is connected to
a device in that slot is faulty. Make sure that all SCSI cables are
plugged in securely. If you connected a chain of external devices to
the slot, make sure that the last device has a SCSI terminator on the
unused SCSI connector. Then turn the system unit off and on. If the
test message appears again, copy the entire message and call your
system manager or Customer Support Center. Note that you can still
use SCSI connectors in the option slots.
Caution:
tlb/prb The CPU module is faulty. Copy the entire message and call your
tlb/reg system manager or Customer Support Center.
scsi/target destroys data on the medium that it tests.
Troubleshooting 10–19