Lenovo ThinkPad 360 Hardware Maintenance Manual - Page 52

Peripheral Device Related Symptoms Symptom/Error FRU/Action External display does not work correctly. 1. See "External Display Self-Test" in the "Common Devices Checkout" section. Printer problems. 1. Run Printer Self-test. 2. System Board 3. Parallel Port Device 4. Cable Serial or parallel port device problems. 1. Device 2. Device Cable 3. System Board Other Symptoms Symptom/Error PCMCIA slot pin is damaged. FRU/Action 1. 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 hang problems can be caused by a variety of reasons that have nothing to do with a hardware defect such as: cosmic radiation, electrostatic discharge, or software errors. FRUs replacement should only be considered when a recurring problems exists. When analyzing the intermittent problem, do the following: 1. Run the advanced diagnostic test for the system board 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 You are here because the diagnostic tests did not identify which adapter or device failed, installed devices are incorrect, a short circuit is suspected, or the system is inoperative. Follow the procedures below to isolate the failing FRU (do not isolate non-defective FRUs). 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 29.) 1. Power-off the computer. 42 IBM Mobile Systems HMM