8-4
Troubleshooting
Portable
PLUS
Computer
8.2.1 Main Diagnostic Procedure
Check the unit by performing the following steps. For a good unit, you'll proceed thru
the
entire main
sequence without branching to any of the repair procedures in section 8.2.2.
Problem Analysis:
1. Read Comments.
Determine the customer's concern,
if
possible. Frequently, the customer
in-
cludes with the unit a message describing the problem.
•
If
the message indicates a problem with a particular portion of the unit, test only
that
section
of
the unit
(and
any
other
sections
that
may relate to the problem) in the steps below.
•
If
the message indicates a problem with a
peripheral
(rather
than
with the computer), test the
corresponding interface in the computer. Also check the HP-IL function of
an
HP-IL peripheral.
To
check a peripheral completely, test it according to its service manual.
•
If
the message indicates a problem with a SNALink/3270 software drawer, test
it
according to
the procedure in section 8.6.
•
If
the
customer's message indicates a problem with the recharger, test it according to the proce-
dure
in section 8.4.
2.
Observe Symptoms.
If
possible, try to observe the trouble by duplicating the situation described
in the customer's message. Determine
how
the observed or reported behavior differs from the
proper behavior. Also take note
of
functions that
do
work properly.
3.
Separate Problems. Separate the observed symptoms into distinct problems. Use the trouble-
shooting procedure below to correct
one
problem
at
a
time,
starting with the more critical system
functions.
4.
Consider Causes. Consider the possible causes for each problem. Keep them in
mind
as you
troubleshoot.
Preparation:
5.
Turn
On
Computer. With
no
external devices connected to the computer, press the @ key (or
other
keys) to
turn
on
the computer.
•
If
the main
PAM
screen appears, go to step 6. (For C
and
D versions
and
early E
and
F ver-
sions, check the
amount
of available memory
shown
at the upper-right corner
of
the PAM
screen.
If
the
amount
is
unreasonable
considering the
amount
of
RAM
in the computer, check
the
memory
PCA as described in chapter 11.)
•
If
the MS-DOS system (not
PAM)
is active
at
turn
on, type exit (Return) to obtain
the
main
PAM screen,
then
proceed according to either of the other choices for this step.
•
If
any
other display appears, or if
no
display appears, repeat this step with all plug-in drawers
replaced
by
dummy
drawers (or install a port
jumper-part
number
45711-60918-between
pins 1
and
2 in each plug-in connector).
If
the computer still doesn't
turn
on, skip
to
step
9.
6.
Set
Up
System. Turn off the computer by holding the @ key for
at
least 15 seconds,
then
connect the computer to a good
HP
9114 Disc Drive using two good HP-IL cables. (Don't connect
any
other HP-IL devices at this time.) Turn
on
the disc drive,
then
turn
on
the computer (press
@ or other keys,
if
necessary).
•
If
the main PAM screen appears, go to step
7.
•
If
the MS-DOS system (not
PAM)
is active at
turn
on, type exit (Return) to obtain the main
PAM
screen,
then
proceed according to either
of
the other choices for this step.
•
If
any other display appears, or if
no
display appears,
skip
to
step
9.
1)
/
To Next Page
Loading...
