DEC MicroVAX 3100 Owner's Manual page 96

Table 6-1 (Cont.): Basic Troubleshooting
Symptom
System Problems
Possible Cause Suggested Solution
Problem with console port. Power down the system. Check
the position of the Break En-
able switch on the back of
the system boxl. See Fig-
ure 2-2. It should be in
the down position if a ter-
minal connected to MMJ port 1
is used as the console de-
vice. It should be in the up
position if a terminal con-
nected to MMJ port 3 is used
as the console device. Con-
firm that the terminal has
no output when connected to ei-
ther port.
Power up display contains Possible hard disk error.
question marks or aster-
If question marks or aster-
isks appear with any num-
bers in the power-up display,
see the self-tests and the sys-
tem exerciser in this chap-
ter for further test instruc-
isks.
Operating system software
display does not appear
on the screen.
System default flags have
to be set.
Operating system software
is not installed.
Power cable and data ca-
ble are not installed cor-
rectly.
tions.
See Section 2.4 and Appendix A.
See the operating system soft-
ware documentation for instal-
lation instructions.
See the self-test and system ex-
erciser descriptions in this chap-
ter for further test instruc-
tions.
Check that power cable and
data cable are installed cor-
rectly at both ends.
lThe position of the BREAK ENABLE switch is only read during power up.
Handling Problems
6-3