Lenovo ThinkPad 360 Hardware Maintenance Manual - Page 36

Memory Checkout See the following table for the available memory size of each card. IC DRAM 0 MB 2 MB 4 MB 8 MB Memory size 3712 KB 5760 KB 7808 KB 11904 KB 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 memory card is fully installed into the connector. Loose connections can cause errors. 1. Power-off the computer and remove the IC DRAM 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 IC DRAM card; then power-on the computer. Verify the memory size; then test the memory. If an error appears, replace the IC DRAM 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 45 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: Connecting the AC Adapter, and installing the charged battery pack in the computer. New versions of system programs. New features or options are added. To update the flash memory, do the following. 1. Get the appropriate diskette which contains 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. 26 IBM Mobile Systems HMM