IBM 380Z manual Screw Tightening Information, How Use Error, Port, Problems

Screw Tightening Information

Loose screws can cause a reliability problem. The IBM ThinkPad computer addresses this problem with nylon-coated screws. Tighten screws as follows:

Plastic	to	plastic
Turn	an	additional90 degrees	after	the screw head
touches		the surface	of the	plastic part:

Logic	card	to plastic
Turn	an	additional180 degrees	after	the	screw head
touches		the surface	of the	logic	card:

Torque driver

If you have a torque driver, refer to the “Torque” instruction with each step.

How

to

Use

Error

Messages:

Use the error

codes displayed on the screen

to

diagnose

failures. If

more than one error code

is displayed, begin the diagnosis

with the first error code. Whatever caused

the first

error

code can result in false

error codes being displayed. If no

error

code

is

displayed,

see

if

the

error

symptom

is

listed

in the “Symptom-to-FRU Index” on

page 23.

Port

Replicator

Problems:

If you suspect a

problem with the port replicator, see “Port Replicator

Checkout” on

page 18.

How to Diagnose Multiple FRUs:

When the

adapter or the device has more

than

one

FRU,

the

error

code could be caused by any of them. Before replacing

multiple

FRUs,

try

removing

or exchanging each FRU, one

by one in the designated

sequence,

to

see

if

the

symptoms

change.

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