2
Troubleshooting Procedures
Satellite A20 Maintenance Manual (960-444)
2-iii
Chapter 2
Contents
2.1
Troubleshooting
...........................................................................................................
2-1
2.2
Troubleshooting Flowchart
...........................................................................................
2-3
2.3
Power Supply Troubleshooting
.....................................................................................
2-7
Procedure 1
Power Status Check
......................................................................
2-7
Procedure 2
Error Code Check
.........................................................................
2-9
Procedure 3
Connection Check
.......................................................................
2-16
Procedure 4
Quick Charge Check
...................................................................
2-17
Procedure 5
Replacement Check
.....................................................................
2-18
2.4
System Board Troubleshooting
...................................................................................
2-19
Procedure 1
Message Check
...........................................................................
2-20
Procedure 2
Printer Port LED Check on Boot Mode
.......................................
2-22
Procedure 3
Diagnostic Test Program Execution Check
....................................
2-31
Procedure 4
Replacement Check
.....................................................................
2-32
2.5
FDD Troubleshooting
.................................................................................................
2-33
Procedure 1
FDD Head Cleaning Check
..........................................................
2-33
Procedure 2
Diagnostic Test Program Execution Check
....................................
2-34
Procedure 3
Connector Check and Replacement Check
...................................
2-35
2.6
HDD Troubleshooting
................................................................................................
2-36
Procedure 1
Message Check
...........................................................................
2-36
Procedure 2
Partition Check
............................................................................
2-37
Procedure 3
Format Check
..............................................................................
2-38
Procedure 4
Diagnostic Test Program Execution Check
....................................
2-39
Procedure 5
Connector Check and Replacement Check
...................................
2-40
2.7
Keyboard Troubleshooting
.........................................................................................
2-41
Procedure 1
Diagnostic Test Program Execution Check
....................................
2-41
Procedure 2
Connector and Replacement Check
..............................................
2-42