User guide

Table 1–1 Basic Troubleshooting
Symptom Possible Cause Suggested Solution
System Problems
The system unit fan is off
or the power light is off.
The power cord is not
connected. The power cord
may be faulty. The power
socket may not be working.
Make sure that all the power cords
are connected correctly at both
ends. Try a power cord that works
or test the power socket with an
appliance that works.
The overload protection
circuitry of the power
supply may have shut down
because of an abnormal
condition on the power line.
Turn the system off and then turn
it back on.
The power supply unit
(PSU) is faulty.
Contact your Digital services
representative.
The power-up display does
not show after 20 seconds.
The console terminal is
plugged into port 0.
The console only functions via port
3. Move connection to port 3.
The power cord is not
connected. The power cord
may be faulty. The power
socket may not be working.
Make sure that all the power cords
are connected correctly at both
ends. Try a power cord that works
or test the power socket with an
appliance that works.
The terminal fuse may have
blown.
Replace the blown terminal fuse.
See the terminal documentation.
The terminal settings may
be incorrect.
See the VAX 4000 Model 105A
/106A Operator Information
manual for the list of correct
terminal settings. See the terminal
documentation for information on
setting up the terminal.
The port to which the
terminal connects may be
faulty.
Try connecting the terminal to
another system. If this solution
works, the port to which the
terminal was connected is faulty. If
the terminal still does not operate,
it is faulty. In either case, contact
your Digital services representative.
(continued on next page)
Troubleshooting and Diagnosing Problems 1–3