North Star DIMENSION Service Manual page 96

TROUBLESHOOTING
Keyboard Problems ( cont.)
Symptom Explanation Solution
The system
occasionally
fails after
touching the
keyboard.
Sometimes
touching the
keyboard
makes the
Caps Lock
and Num Lock
lights turn
on.
1. Reduce environmental static-electricity by using
floor mats , carpet treatments, humidity control, or
grounding workstation users before they touch
their keyboards.
2. Keyboard lockups are usually caused by failure of
the workstation board . Failure during power-on is
probably due to a defective 2681 device ; failure
after warmup is probably due to a defective
26LS32.
2-50 DIMENSION Service Manual