IBM ThinkPad 340 Series Hardware Maintenance Manual

Also see for 360: Specifications Hardware Maintenance Manual Operating guide User guide Manual

How to Use Error Messages: Use the errorcodes displayed on the screen to diagnose failures. Ifmore than one error code is displayed, begin the diagnosiswith the first error code. The cause of the first error codecan result in false error codes being displayed. If no errorcode is displayed, see if the error symptom is listed in the“Symptom-to-FRU Index” on page 216.How to Diagnose Multiple FRUs: When theadapter or device has more than one FRU, the error codecould be caused by either FRU. Before replacingmulti-FRUs, try removing or exchanging each FRU, one byone in the designated sequence, to see if the symptomschange.Passwords: The Passwords are security features thatare used to protect the system and the hard disk data fromunauthorized access. There are three types of passwordsas follows: Power-on Password (POP) Hard disk Password (HDP) Supervisor Password (Privileged Access Password,PAP)No overriding is provided. Obtaining permission from thepassword owner to unlock the password is a prerequisitefor running diagnostic tests and performing maintenanceservice.See “Password Combinations” on page 230 for moreinformation about passwords.How to Disable the Power-On Password:ImportantThis information is not available in this HMM onlineformat. See your IBM Servicer or IBM AuthorizedDealer for this procedure.Reset Pushbutton: The reset pushbutton resets thesystem regardless of the microcode status and forcespower to be powered-off. Use this pushbutton to power-offwhen power is not completely off or the microcode is in ahung state. See “System Board (Top View)” on page 292for the location of the pushbutton.Port Replicator Problems: If you suspect aproblem with the Port Replicator, see “Port ReplicatorCheckout” in the “Common Devices Checkout” section formore information.ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 199