Lenovo ThinkPad 360 Hardware Maintenance Manual - Page 162

Other Symptoms Symptom/Error Errors occur only when MultiPort II is used PCMCIA slot pin is damaged. FRU/Action 1. See "MultiPort II Checkout" on page 134. 1. Bottom System Board. Note: If you cannot find a symptom or error in this list and the problem remains, see "Undetermined Problems." Intermittent Problems Intermittent system interruptions can be caused by a variety of reasons that have nothing to do with a hardware defect, such as electrostatic discharge or software errors. Consider replacing a FRU only when a recurring problem exists. When analyzing the intermittent problem, perform the following steps: 1. Run the advanced diagnostics test in loop mode at least 10 times. 2. If no error is detected, do not replace any FRUs. 3. If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more errors exist. Undetermined Problems Perform the following procedures to isolate the failing FRU if the diagnostics tests did not identify which adapter or device failed, or whether the installed devices are incorrect, a short circuit is suspected, or the system is inoperative. Note: Do not replace a nondefective FRU. Before performing these procedures, perform the following actions: Verify that all attached devices are supported by the computer. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 135.) 1. Power-off the computer. 2. Check the cables, wires, and connectors for short circuits and open circuits. Visually check them for damage. If any problems are found, replace the FRU. 152 IBM Mobile Systems HMM