North Star DIMENSION Service Manual page 55

TROUBLESHOOTING
(cont.) Boot Problems
Symptom Explanation Solution
(continued) 5. The diskette drive LED continues to flicker (with
pauses ) for 30 seconds or more (up to 2. 5 minutes
for a 12 user system).
o If the diskette drive stops reading and nothing
further occurs , refer to the section on hardware
problems.
6. The sign - on screen appears.
o If it doesn 't, check that:
All workstation board thumbwheel switches
are set to numbers between 1-12
The each number is used only once
The workstation cable is securely fastened at
both ends
The monitor is turned on and the brightness
level is turned up
o If you've checked all these items and a problem
still exists , use a different workstation board. If
the board has RAM expansion , remove it. If a
problem still exists , refer to the section on
hardware problems.
o If blank screens appear at two or more
workstations each time the central module is
turned on , and if unplugging and reconnecting
the keyboards resolves the problem on each
occasion , suspect the +12VDC power supply.
Refer to the +12VDC power supply discussion.
DIMENSION Service Manual 2-9