Toshiba PORTEGE M780 Maintenance Manual page 45

Chapter 2
2 2-2
2.1 Troubleshooting ......................................................................................................2-6
2.2 Troubleshooting Flowchart.....................................................................................2-8
2.3 Power Supply Troubleshooting.............................................................................2-13
2.3.1 Procedure 1 Power Status Check ........................................................2-13
2.3.2 Procedure 2 Error Code Check ...........................................................2-15
2.3.3 Procedure 3 Connection Check...........................................................2-21
2.3.4 Procedure 4 Charging Check ..............................................................2-22
2.3.5 Procedure 5 Replacement Check ........................................................2-22
2.4 System Board Troubleshooting.............................................................................2-23
2.4.1 Procedure 1 Message Check ...............................................................2-24
2.4.2 Procedure 2 Debugging Port Check....................................................2-26
2.4.3 Procedure 3 Diagnostic Test Program Execution Check....................2-30
2.4.4 Procedure 4 Replacement Check ........................................................2-30
2.5 USB FDD Troubleshooting ..................................................................................2-31
2.5.1 Procedure 1 FDD Head Cleaning Check ............................................2-31
2.5.2 Procedure 2 Diagnostic Test Program Execution Check....................2-32
2.5.3 Procedure 3 Connector Check and Replacement Check.....................2-33
2.6 2.5" HDD Troubleshooting...................................................................................2-35
2.6.1 Procedure 1 Partition Check ...............................................................2-35
2.6.2 Procedure 2 Message Check ...............................................................2-36
2.6.3 Procedure 3 Format Check..................................................................2-37
2.6.4 Procedure 4 Diagnostic Test Program Execution Check....................2-38
2.6.5 Procedure 5 Connector Check and Replacement Check.....................2-39
2.7 Keyboard Troubleshooting ...................................................................................2-40
2.7.1 Procedure 1 Diagnostic Test Program Execution Check....................2-40
2.7.2 Procedure 2 Connector Check and Replacement Check.....................2-40
2.8 Touch pad Troubleshooting ..................................................................................2-41
2.8.1 Procedure 1 Diagnostic Test Program Execution Check....................2-41
2.8.2 Procedure 2 Connector Check and Replacement Check.....................2-42
PORTEGE M780 Maintenance Manual (960-809)
Contents
Troubleshooting Procedures
[CONFIDENTIAL] 2-3