Lenovo ThinkPad 380ED ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 535

Read This First Before you go to the checkout guide, be sure to read this section. Important Notes Only certified trained personnel should service the computer. Read FRU service procedures before replacing any FRUs. Be extremely careful during write operations (copying, saving, or formatting). Drives in the computer that you are servicing might have been rearranged, or the drive startup sequence might have been altered. If you select an incorrect drive, data or programs might be overwritten. Replace FRUs only for the correct model. When you replace a FRU, make sure the model of the machine and FRU part number are correct by referring to the parts list. FRUs should not be replaced because of a single, unreproducible failure. Single failures can occur for a variety of reasons that have nothing to do with a hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a recurring problem exists. If this is suspected, clear the error log and run the test again. Do not replace any FRUs if log errors do not reappear. Be careful not to replace a nondefective FRU. How to Use Error Messages: Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. The cause of the first error code can cause subsequent error codes to be false. If no error code is displayed, see if the error symptom is listed in the "Symptom-to-FRU Index" on page 542. Port Replicator Problems: If you suspect a problem with the Port Replicator, see "Common Devices Checkout" on page 681. How to Diagnose Multiple FRUs: If the adapter or device has more than one FRU, the error code could be caused by any one of them. Before replacing multiple FRUs, try removing or exchanging each FRU, one by one in the designated sequence, to see if the symptoms change. ThinkPad 770 (9548, 9549) 523