Filter
Top Products
Memory errors might stop system operations, show error
messages on the screen, or hang the system.
Use the following procedure to isolate memory problems:
Note: Make sure that the DIMM adapter card is fully
installed into the connector. A loose connection
can cause an error.
1. Power-off the computer and remove the DIMM
adapter card from its slot (if installed).
2. Press and hold the F1 key; then power-on the
computer. Hold the F1 key down until the
Easy-Setup screen appears.
3. Select Test and press Enter.
4. Select Memory and press Enter to run the memory
test on base memory. If an error appears, replace
the system board.
5. Power-off the computer and reinstall the DIMM
adapter card; then power-on the computer. Verify the
memory size; then test the memory. If an error
appears, replace the DIMM adapter card.
If memory problems occur intermittently, use the loop
option to repeat the test. When the test detects an error,
an error log is printed on the printer connected to the
parallel port. See “Error Log” on page 374 for more
information.
System Programs in Flash Memory:
System setup
programs and diagnostic tests are stored in flash memory.
Flash Memory Update:
A flash memory update is
required for the following conditions:
New versions of system programs.
New features or options are added.
To update the flash memory, do the following:
1. Get the appropriate diskette containing the update.
2. Insert the System Program Service Diskette into drive
A and power-on the computer.
3. Select Update system programs from the menu.
System Board and CPU Card Checkout
The processing functions are performed by both the
system board and the CPU card. Processor problems can
be caused by either FRU. However, the CPU card
generally has a lower probability of failure. When a
numeric code calls the system board or the CPU card as a
FRU, or the CPU card is called by a diagnostic test by
showing FRU code 11, use the following procedure to
isolate the problem:
1. Run the system board test to verify the symptom.
This test verifies both the system board and the CPU
card. If no error is detected, return to “Checkout
Guide” on page 341.
344 IBM Mobile Systems - ThinkPad HMM Volume 3