Lenovo ThinkPad 760CD ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 220
System Board and CPU Card Checkout, Insert the System Program Service Diskette into drive
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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 238 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 205. 208 IBM Mobile Systems HMM