IBM 4840-544 Service Guide - Page 53

Troubleshooting

Page 53 highlights

August 3, 2006 Troubleshooting Troubleshooting If the SurePOS 500 Models 5x3 and 544/564 system fails and there is no error message or beep code, see Table 7 to find problem symptoms and take the related action. Note: Corrupted CMOS may cause unpredictable problems. Before exchanging the system board in an attempt to fix a problem, go to "Clearing the CMOS settings" on page 23 and reset CMOS to see if corrupted CMOS is the source of the trouble. Table 7. Symptoms and actions If the problem is... Here's what to do. No power light on the tower unit. 1. Ensure that the system unit is plugged into a working electrical outlet and replug the power cable at the power supply. 2. Verify the LED card cable is plugged in. 3. Verify the power cable is plugged into the system board connectors P1 and P2. 4. Replace the power supply. See "Power supply - removing and replacing" on page 57. 5. Replace the system board. See "System board - removing and replacing" on page 65. Operator display exhibits: Blank screen No cursor displayed Screen is unreadable Other display problems. 1. Adjust the brightness control at the bottom right side of the display. 2. Ensure that the operator display cable is securely connected. 3. Switch unit off and back on. | 4. Run the operator display test. Refer to "Running | Diagnostics" on page 30.. 5. Replace the display tablet. See "Display tablet - removing and replacing" on page 48. 6. Replace the system board. Cash drawer does not open when cash drawer key is turned to the open position. 1. Replace the keylock insert if the lock does not turn with the key. See "Removing and replacing the keylock insert" on page 116. 2. Gently pull the drawer open while holding the key turned to the open position to determine if the slide assembly is binding. Look for items that may cause binds, such as pens or paper clips. Replace the slide assembly if necessary. See "Removing and replacing a full-size slide assembly" on page 106 or "Removing and replacing the compact slide assembly" on page 109. 3. Replace the cam, pawl, and spring kit. See "Removing and replacing components of the latch and sensor assembly" on page 115. 4. Check for a bent actuator rod. Replace the actuator rod if necessary. See "Removing and replacing the keylock assembly" on page 113. Chapter 3. Resolving problems 27

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Troubleshooting
If
the
SurePOS
500
Models
5x3
and
544/564
system
fails
and
there
is
no
error
message
or
beep
code,
see
Table
7
to
find
problem
symptoms
and
take
the
related
action.
Note:
Corrupted
CMOS
may
cause
unpredictable
problems.
Before
exchanging
the
system
board
in
an
attempt
to
fix
a
problem,
go
to
“Clearing
the
CMOS
settings”
on
page
23
and
reset
CMOS
to
see
if
corrupted
CMOS
is
the
source
of
the
trouble.
Table
7.
Symptoms
and
actions
If
the
problem
is...
Here’s
what
to
do.
No
power
light
on
the
tower
unit.
1.
Ensure
that
the
system
unit
is
plugged
into
a
working
electrical
outlet
and
replug
the
power
cable
at
the
power
supply.
2.
Verify
the
LED
card
cable
is
plugged
in.
3.
Verify
the
power
cable
is
plugged
into
the
system
board
connectors
P1
and
P2.
4.
Replace
the
power
supply.
See
“Power
supply
removing
and
replacing”
on
page
57.
5.
Replace
the
system
board.
See
“System
board
removing
and
replacing”
on
page
65.
Operator
display
exhibits:
Blank
screen
No
cursor
displayed
Screen
is
unreadable
Other
display
problems.
1.
Adjust
the
brightness
control
at
the
bottom
right
side
of
the
display.
2.
Ensure
that
the
operator
display
cable
is
securely
connected.
3.
Switch
unit
off
and
back
on.
4.
Run
the
operator
display
test.
Refer
to
“Running
Diagnostics”
on
page
30..
5.
Replace
the
display
tablet.
See
“Display
tablet
removing
and
replacing”
on
page
48.
6.
Replace
the
system
board.
Cash
drawer
does
not
open
when
cash
drawer
key
is
turned
to
the
open
position.
1.
Replace
the
keylock
insert
if
the
lock
does
not
turn
with
the
key.
See
“Removing
and
replacing
the
keylock
insert”
on
page
116.
2.
Gently
pull
the
drawer
open
while
holding
the
key
turned
to
the
open
position
to
determine
if
the
slide
assembly
is
binding.
Look
for
items
that
may
cause
binds,
such
as
pens
or
paper
clips.
Replace
the
slide
assembly
if
necessary.
See
“Removing
and
replacing
a
full-size
slide
assembly”
on
page
106
or
“Removing
and
replacing
the
compact
slide
assembly”
on
page
109.
3.
Replace
the
cam,
pawl,
and
spring
kit.
See
“Removing
and
replacing
components
of
the
latch
and
sensor
assembly”
on
page
115.
4.
Check
for
a
bent
actuator
rod.
Replace
the
actuator
rod
if
necessary.
See
“Removing
and
replacing
the
keylock
assembly”
on
page
113.
Troubleshooting
August
3,
2006
Chapter
3.
Resolving
problems
27
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