IBM Thinkpad A30 A30p A31 A31p Dock Manual

Intermittent problems
Intermittent system hang problems can be due to a variety
of causes that have nothing to do with a hardware defect,
such as cosmic radiation, electrostatic discharge, or
software errors. FRU replacement should be considered
only when a problem recurs.
When analyzing an intermittent problem, do the following:
1. Run the diagnostic test for the system board in loop
modeat least 10 times.
2. If no error is detected, donotreplace any FRUs.
3. If any error is detected, replace the FRU...

FRU replacement notices
This section contains notices related to removing and
replacing parts. Read this section carefully before replacing
any FRU.
Screw notices
Loose screws can cause a reliability problem. In IBM
ThinkPad computer, this problem is addressed with special
nylon-coated screws that have the following characteristics:
vThey maintain tight connections.
vThey do not easily come loose, even with shock or
vibration.
vThey are harder to tighten.
vThey should be used only once.
Do the following...

vMake sure you use the correct screw. If you have a
torque screwdriver, tighten all screws firmly to the torque
shown in the table.Never use a screw that you
removed. Use a new one. Make sure the screws are
tightened firmly.
Retaining serial numbers
This section includes the following descriptions:
v“Restoring the serial number of the system unit”
v“Retaining the UUID”
Restoring the serial number of the system
unit
When the computer was manufactured, the EEPROM on
the system board was loaded with the...

and stored in the EEPROM of your system board. The
algorithm that generates the number is designed to provide
unique IDs until the year A.D. 3400. No two computers in
the world have the same number.
When you replace the system board, you must set the
UUID on the new system board as follows:
1. Install the ThinkPad Hardware Maintenance Diskette
Version 1.62, and restart the computer.
2. From the main menu, select4. Assign UUID.
A new UUID is created and written. If a valid UUID
already exists, it is not...

Removing and replacing a FRU
This section presents directions and drawings for use in
removing and replacing a FRU. Be sure to observe the
following general rules:
1. Do not try to service any computer unless you have
been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review“FRU replacement
notices”on page 58.
3. Begin by removing any FRUs that have to be removed
before the failing FRU. Any such FRUs are listed at the
top of the page. Remove them...

1010 Battery pack
DANGER
12
The use only the battery in the parts listing for your
computer. Use of an incorrect battery can result in
ignition or explosion of the battery.
Removing and replacing a FRU
62MT 2652/2653/2654 

1020 Mini PCI adapter
For access, remove this FRU:
v“1010 Battery pack”on page 62
Note:Loosen the screws
1, but do not remove them.
211
(continued)
Removing and replacing a FRU
ThinkPad A30, A30p, A31, A31p63 

The following illustrations show the wireless LAN/modem
combo card. Antenna cables
3aand
3bare for the
wireless LAN feature, and
6is for the modem feature.
This slot also supports a Mini PCI modem card.
Note:When unplugging the antenna jack, do not pull the
cable; it might snap. Unplug the jack by pulling a
tab with your fingers.
3a
3b
When installing:Plug the gray antenna cable with the tab
marked“MAIN”(
3a) into jackJ1, and
the black antenna cable with the tab
marked“AUX”(
3b) into jackJ2.
5
5
4...

6
7
When installing:With the notched end of the card toward
the socket, insert the card into the
socket, and then press it firmly. Pivot the
card until it snaps into place. Make sure
that the card is firmly fixed in the slot
and does not move easily.
Removing and replacing a FRU
ThinkPad A30, A30p, A31, A31p65 

1030 Communication daughter card
(CDC)
For access, remove this FRU:
v“1010 Battery pack”on page 62
Note:Loosen the screws
1, but do not remove them.
211
(continued)
Removing and replacing a FRU
66MT 2652/2653/2654