Acer TravelMate 420 Service Manual

Also see for TravelMate 420: Guía del usuario Manuel d'utilisation Guia do utilizador

Contents

Chapter 4 77Use the following procedure as a guide for computer problems.NOTE: The diagnostic tests are intended to test this model (TravelMate 420 series). Non-Acer products,prototype cards, or modified options can give false errors and invalid system responses.1. Obtain the failed symptoms in as much detail as possible.2. Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeatingthe same operation.3. If any problem occurs, you can perform visual inspection before you fellow this chapter’s instructions. Youcan check the following:power cords are properly connected and secured;there are no obvious shorts or opens;there are no obviously burned or heated components;all components appear normal.4. After you perform visual inspection you can also verify the following:ask the user if a password is registered and, if it is, ask him or her to enter the password.verify with the customer that Wndows XP is installed on the hard disk. Operating systems thatwere not preinstalled by Acer can cause malfunction.make sure all optional equipment is removed from the computer.make sure the floppy disk is empty.5. Use the following table with the verified symptom to determine which page to go to.Symptoms (Verified) Go ToPower failure. (The power indicator does not goon or stay on.)“Power System Check” on page 79.POST does not complete. No beep or errorcodes are indicated.“Power-On Self-Test (POST) Error Message” onpage 83“Undetermined Problems” on page 90POST detects an error and displayed messageson screen.“Error Message List” on page 84The diagnostic test detected an error anddisplayed a FRU code.“System Diagnostic Diskette” on page 52Other symptoms (i.e. LCD display problems orothers).“Power-On Self-Test (POST) Error Message” onpage 83Symptoms cannot be re-created (intermittentproblems).Use the customer-reported symptoms and go to“Power-On Self-Test (POST) Error Message” onpage 83“Intermittent Problems” on page 89“Undetermined Problems” on page 90TroubleshootingChapter 4