IBM ThinkPad 240X, Hardware Maintenance Manual

Page: 32 / 84

3. If no sound is heard, replace the speaker.
Fan ASM Checkout
To check the fan ASM, do the following:
1. Boot from the diagnostics diskette and start the
program.
2. Go to Diagnostics on the main menu and select
Other Devices.
3. Follow the description in the window. If the test
detects a fan ASM problem, replace the fan.
Keyboard and Auxiliary Input Device
Checkout
Note: Remove the external keyboard if the internal key-
board is to be tested.
If the internal keyboard does not work or an unexpected
character appears, make sure that the flexible cable
extending from the keyboard is correctly seated on the
connector.
If the keyboard cable connection is correct, run the Key-
board Test. See “Running the Diagnostics” on page 40 for
details.
If the test detects a keyboard problem, do the following
one at a time to correct the problem. Do not replace a non-
defective FRU.
1. Replace the keyboard.
2. Replace the system board.
The following auxiliary input devices are supported for this
computer:
Ÿ
Numeric keypad
Ÿ
Mouse (PS/2 compatible)
Ÿ
External keyboard (with keyboard/mouse cable)
If any of these devices do not work, reseat the cable con-
nector and repeat the failing operation.
If the problem does not reoccur, replace the device and
then the system board.
Memory Checkout
DIMM are available for increasing memory capacity.
Onboard (MB) Slot (MB) Total Memory
(MB)
64 0 64
64 32 96
64 64 128
64 128 192
26
ThinkPad 240X