6-2
Chapter 6: Hardware Service
Problem Isolation Procedures
NCR
offers
both
on
‐
site
and
‐
in
service
for
the
NCR
RealPOS
5953
USB
DynaKey.
Before
calling
for
service
or
mailing
in
your
unit
for
repair,
step
through
the
problem
isolation
procedures
below
to
make
sure
the
DynaKey
module
is
in
need
of
repair.
Also,
your
answers
to
these
questions
may
speed
the
servicing
of
your
DynaKey.
Troubleshooting Table
The
following
table
provides
general
troubleshooting
tips
for
the
DynaKey.
If
you
experience
a
problem
with
your
DynaKey,
please
explore
the
possible
solution
options
in
this
table
before
replacing
any
component
in
the
system.
Symptom Probable
Cause
Solution
DynaKey
keypad
not
working
Keylock
in
L
position
Turn
Keylock
to
another
position
Keyboard
not
powered
Possible
shorted
condition.
Power
for
USB
devices
is
controlled
by
a
USB
distribution
switch.
Some
keys
on
the
DynaKey
keypad
not
working
DynaKey
is
in
PC
Setup
mode
(LED
is
flashing
red/green)
Power
cycle
the
system.
DynaKey
hot
plugged
into
terminal
with
terminal
powered
on.
Re
‐
boot
the
system