IBM 4800-741 Hardware Service Guide - Page 92

Problem, isolation

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Updated July 14, 2008 Problem isolation If the SurePOS 700 fails, follow the procedures that are described in Table 6. If you cannot solve the problem, contact a trained service technician. Table 6. Actions to isolate the cause of a problem Problem Action to perform The power indicator remains off. 1. Check that the AC power cord is plugged into both the wall outlet and the back of the terminal. 2. Ensure that AC power is present at the wall outlet. Continuous series of beeps 1. Check to see if memory is bad or missing. Video display is failing 1. Verify that the video-display cables are securely connected. (totally blank screen, no cursor displayed, screen is 2. Ensure that the video-display power cord is plugged in and unreadable, or other powered on. display problems). 3. Verify that the power indicator on the system unit and the indicator light on the display are lit. 4. Adjust contrast and brightness controls on the display. 5. Use the reference documentation (if available) for the display. 6. Exchange the video display. Keyboard does not work or only some keys work. 1. Make sure that the keyboard is securely attached to the keyboard port. 2. Move your fingers across the keys. Make sure that no keys are stuck. 3. Make sure that you are on a screen that allows typing. Some screens do not allow you to type on them. One or more POS I/O devices are failing. 1. Ensure that the I/O devices are securely and correctly connected to the system unit. 2. If the device has its own power cord and power switch, ensure that it has power and that the power switch is on. 3. Exchange the cables. 4. If a POS I/O device is available that is known to be good, substitute it for the failing device to help in isolating the failure. An optional feature adapter is failing. See the service information for the adapter. System does not power off Press and hold the power button until the unit powers off. when the power switch is (approximately 5 seconds) pressed. Notes: 1. Some devices that attach to the system have test instructions. Refer to those instructions when testing those devices. 2. Record any error message or symptom so that this information is available when service is called. 3. When using application software, you might receive error messages that apply to the software. Refer to the software manual for explanations of those messages. 74 SurePOS 700 Series: SurePOS 700-721/741/781, 722/742/782 Hardware Service Guide

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Problem
isolation
If
the
SurePOS
700
fails,
follow
the
procedures
that
are
described
in
Table
6.
If
you
cannot
solve
the
problem,
contact
a
trained
service
technician.
Table
6.
Actions
to
isolate
the
cause
of
a
problem
Problem
Action
to
perform
The
power
indicator
remains
off.
1.
Check
that
the
AC
power
cord
is
plugged
into
both
the
wall
outlet
and
the
back
of
the
terminal.
2.
Ensure
that
AC
power
is
present
at
the
wall
outlet.
Continuous
series
of
beeps
1.
Check
to
see
if
memory
is
bad
or
missing.
Video
display
is
failing
(totally
blank
screen,
no
cursor
displayed,
screen
is
unreadable,
or
other
display
problems).
1.
Verify
that
the
video-display
cables
are
securely
connected.
2.
Ensure
that
the
video-display
power
cord
is
plugged
in
and
powered
on.
3.
Verify
that
the
power
indicator
on
the
system
unit
and
the
indicator
light
on
the
display
are
lit.
4.
Adjust
contrast
and
brightness
controls
on
the
display.
5.
Use
the
reference
documentation
(if
available)
for
the
display.
6.
Exchange
the
video
display.
Keyboard
does
not
work
or
only
some
keys
work.
1.
Make
sure
that
the
keyboard
is
securely
attached
to
the
keyboard
port.
2.
Move
your
fingers
across
the
keys.
Make
sure
that
no
keys
are
stuck.
3.
Make
sure
that
you
are
on
a
screen
that
allows
typing.
Some
screens
do
not
allow
you
to
type
on
them.
One
or
more
POS
I/O
devices
are
failing.
1.
Ensure
that
the
I/O
devices
are
securely
and
correctly
connected
to
the
system
unit.
2.
If
the
device
has
its
own
power
cord
and
power
switch,
ensure
that
it
has
power
and
that
the
power
switch
is
on.
3.
Exchange
the
cables.
4.
If
a
POS
I/O
device
is
available
that
is
known
to
be
good,
substitute
it
for
the
failing
device
to
help
in
isolating
the
failure.
An
optional
feature
adapter
is
failing.
See
the
service
information
for
the
adapter.
System
does
not
power
off
when
the
power
switch
is
pressed.
Press
and
hold
the
power
button
until
the
unit
powers
off.
(approximately
5
seconds)
Notes:
1.
Some
devices
that
attach
to
the
system
have
test
instructions.
Refer
to
those
instructions
when
testing
those
devices.
2.
Record
any
error
message
or
symptom
so
that
this
information
is
available
when
service
is
called.
3.
When
using
application
software,
you
might
receive
error
messages
that
apply
to
the
software.
Refer
to
the
software
manual
for
explanations
of
those
messages.
Updated
July
14,
2008
74
SurePOS
700
Series:
SurePOS
700-721/741/781,
722/742/782
Hardware
Service
Guide