General Checkout (3550-001)
The diagnostic tests are intended to test
only
IBM
products. Non-IBM products, prototype cards, or modified
options can give false errors and invalid system responses.
Overall Procedures
1. Test the computer alone, to make sure there is not a
problem with the computer before testing it with the
3550 Expansion Unit. If there is a problem with the
computer, solve it first. Then, test the computer with
the 3550 Expansion Unit.
2. Have the external keyboard, mouse, parallel, and
serial devices connected to the computer and test the
computer. If no problem exists, connect them to the
3550 Expansion Unit and test the 3550 Expansion
Unit with the computer installed.
3. When testing the 3550 Expansion Unit, use the
Diagnostic Diskette supplied with the 3550 Expansion
Unit.
a. Because the serial and parallel ports on the
computer are covered by the 3550 Expansion
Unit, when the computer is installed on the 3550
Expansion Unit, answer “No” when you are
asked if a wrap plug is used.
b. Test the status indicators on the 3550 Expansion
Unit by using the system status indicator test of
the computer. The corresponding indicators on
the 3550 Expansion Unit turn on and off in the
test, except for the power-on indicator. This
power-on indicator does not turn off due to
hardware restriction.
4. If the user did not bring the computer with the 3550
Expansion Unit, use a properly working computer with
the 3550 Expansion Unit.
5. If the diagnostics of the following SCSI devices fail or
stop, suspect that the diagnostic programs are down
level before replacing SCSI devices.
SCSI Tape Drive
(error code = 0211XXXX)
SCSI CD-ROM Drive
(error code = 0215XXXX)
SCSI Rewritable Optical Drive
(error code = 0217XXXX)
To continue the diagnostics of other devices, remove
these SCSI devices from the installed device list
before starting diagnostics.
Important
When the Problem Determination Procedure in the
operation manual that is supplied with the adapter or
device says “Have the system unit serviced,” the
system unit stands for the computer and this 3550
316 IBM Mobile Systems HMM - Volume 1
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