Chapter
4.
Troubleshooting
common
problems
Obtaining
diagnostic
and
service
information
.
.
.
.
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.
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.
. 69
Troubleshooting
capacitive
and
resistive
displays
that
use
the
3M
TouchWare
69
Correct
connections
for
servicing
EIA-232
models
.
.
.
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.
.
. 70
Touch
screen
controller
information
.
.
.
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.
. 70
Troubleshooting
the
4820
Infrared
touch
screen
using
the
ELO
Touch
Properties
Page
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. 72
Troubleshooting
display
beep
.
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. 73
All
models
.
.
.
.
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.
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. 74
LED
states
.
.
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.
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. 78
Testing
the
power
supply
.
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. 79
This
section
describes
several
common
problems
and
explains
what
to
do.
Note:
Some
4820
image
problems
can
be
caused
by
problems
in
the
system
unit
to
which
the
display
is
attached.
Some
procedures
are
specific
for
capacitive
or
resistive
touch
models.
See
Table
1
on
page
1
for
your
touch
technology
and
model
number.
Obtaining
diagnostic
and
service
information
Obtain
service
manuals,
installation
guides,
touch
drivers,
and
diagnostic
diskettes
for
all
4820
displays
from
the
IBM
Retail
Store
Solutions
web
site:
www.ibm.com/solutions/retail/store.
From
the
web
page:
1.
Click
on
Support
.
2.
Click
on
SurePoint
Solution
.
3.
Select
the
appropriate
download
for
your
specific
4820
model.
An
abstract,
download
description,
system
prerequisites,
and
installation
instructions
are
provided
on
each
download
page
to
assist
you.
Also,
use
the
web
site
to
access
the
POS
Knowledgebase
Tips
&
FAQs
search
utility.
Within
this
utility,
find
articles
which
will
assist
you
in
troubleshooting
your
specific
4820
problem.
All
touch
drivers
for
IBM
4820
displays
must
be
obtained
from
this
IBM
web
site
and
not
from
any
other
vendor
or
site
(except
Linux).
The
first
step
in
troubleshooting
is
to
ensure
that
you
have
connected
all
cables
properly.
Troubleshooting
capacitive
and
resistive
displays
that
use
the
3M
TouchWare
3M
TouchWare
is
the
Windows-based
touch
driver
application
for
the
USB
and
EIA-232
versions
of
these
displays
(the
RS-485
version
uses
IBM
POS
touch
drivers).
Update
November
2005
©
Copyright
IBM
Corp.
1999,
2005
69
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Summary of Contents for 4820
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