Memory errors might stop system operation, show error
messages on the screen, or hang the system.
Use the following procedure to isolate memory problems:
1. Turn off the computer and remove any installed DIMM
from its slot.
2. Boot from the diagnostics diskette and start the
program.
3. Go to Diagnostics on the main menu and select
Memory Test. If an error appears, replace the system
board.
4. Turn off the computer and reinstall the DIMM; then
turn on the computer. Verify the memory size; then
test the memory. If an error appears, replace the
DIMM.
Note: Make sure that the DIMM is properly installed into
the connector. A loose connection can cause an
error.
Modem Board Checkout
Do the following to isolate the problem to the system
internal modem:
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.
4. If the test detects a modem problem, replace the
modem card.
Power System Checkout
To verify the symptom of the problem power on the com-
puter using each of the following power sources:
1. Remove the battery ASM.
2. Connect the AC Adapter and check that power is sup-
plied.
3. Disconnect the AC Adapter and install the charged
battery ASM; then check that power is supplied by the
battery ASM.
If you suspect a power problem, refer to the appropriate
power supply check listed below:
“Checking the AC Adapter” on page 28
“Checking the Operational Charging” on page 28
“Checking the Battery ASM” on page 28
General Description
27
Summary of Contents for ThinkPad 240X
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Page 79: ...Description FRU Number Power cord Argentina 2 PIN 36L8870 General Description 73 ...
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