HP Integral Personal Computer Service Manual page 95

8-1'2 Troubl •• lIoetln ...... DI ........ _
4. U the computer has HP-UX System III installed, the ROM test indicates only whether the entire
ROM assembly passed or failed the check-sum test. If a ROM failure
is
indicated for the System
m
ROM assembly, replace it.
If the computer has HP-UX System V installed, the ROM test will check each ROM IC on the
operating system ROM PCA and on the option ROM PCA
(if
one is present). If there
is a ROM
failure, an error message will identify the failed ROM IC. Repair the assembly as described in
table 8-26.
If the ROM test
is
passed, press _
(@)
to return to the menu.
L
.erI.,
Intert • •
Test. To test the port
A
intemlpt lines, run the serial interface test (be sure to
use
a known-good serial interface). Press _
(@)
to return to the first menu, then press
. ; (@)
to start the test.
I. Normally, the follOwing series of messages will be displayed:
Serial card found in port A
Th.
serial card passed
Continuous loop mod.
Numb.r of passes: xx
The test will repeat continuously until either the
power
is turned off or a failure occurs. If an error
message is displayed, troubleshoot the [/0 circuitry following the procedure in table 8-25. If no
error message appears after two passes, go on to step 7.
7. Remove the service diagnostic disc and turn off the computer.
L Remove the serial interface from port A and install it in port B.
I. Reinsert the disc and turn on the computer. Wait until the P.A.M. window appears, select the .
·Service' program, press
_,a,
(QD),
then press _
(OD).
10. Repeat the serial interface test (steps 5 and 6 above) for port B.
11. Remove the disc and
turn
off the computer.
12. Remove the serial interface from port B. [nstall a known-good HP 82998A HP-IB Interface using
the port ext~nder so that you will have access to the switches on the
peA.
Put the jumper in the
system controller
position and set the switches as follows: S 1
==
1, S2:11
0 ,
S3
==
I, S4
==
0, and S5 =- 1.
Connect the external HP-IB to the built-in HP-IB using an HP 82977 A/B HP-IB cable.
13. Reinsert the disc and turn on the computer. Wait until the P.A.M. window appears, select the
·Service' program, press
.a,.
(QD), then press _
(CID).
14. HPei. T ••
t.
Now run the HP-IB test to check the built .. in HP-IB. Press the " . " (@) key to
start the test.
As
the test runs, the program will prompt you to move the system controller/non-
system controller jumper, and to change switch settings. In each case, do as asked, then press
(Return
1.
The test will continue cycling until an error occurs or the power
is
turned off. Remove the
disc and turn off the computer after two passes if no error message' appears.
Note:
If you suspect a problem with the external HP-IB interface (for example, a failed switch
or jumper), troubleshoot the interface (refer to the
Integral Personal Computer Interface and
Memory Module Assembly-Level Service Manual).