2 Troubleshooting Procedures
Satellite L450D/455D, Satellite pro L450D Series Maintenance Manual
18
To determine if the computer’s keyboard is functioning properly, perform the following
procedures. Figure 2-4 outlines the process. Start with Procedure 1 and continue with the
other procedures as instructed.
Procedure 1: External keyboard check
Procedure 2: Diagnostic check
Procedure 3: Connector and replacement check
Procedure 1
External keyboard check
Connect a USB keyboard to one of the computer’s USB ports, and then boot the computer.
The computer automatically detects the external keyboard.
If the external keyboard works correctly, the internal keyboard or its connections may be
faulty. Go to Procedure 2.
If the external keyboard appears to have the same problem as the internal keyboard, the
system board may be having some problem. Replace it with a new one and following the
instructions in Chapter 4.
Procedure 2
Diagnostic check
Run the
test and Diagnostics
Program, which will automatically execute the Keyboard Test.
Refer to Chapter 3,
Tests and Diagnostics
for more information on how to run the program.
If an error is located, go to Procedure 3. If an error does not occur, the keyboard is
functioning ok.
Procedure 3
Connector and replacement check
The keyboard and/or system board may be disconnected or damaged. Disassemble the
computer following the steps described in Chapter 4,
Replacement Procedures
and perform
the following checks.
Check 1
Make sure the keyboard cable is firmly connected to the system board.
If the connection is loose, reconnect firmly and repeat Procedure 2. If there is still
an error, go to Check 2.
Check 2
The keyboard may be damaged. Replace it with a new one following the
instructions in Chapter 4.
If the problem still exists, perform Check 3.
Summary of Contents for Satellite L450 series
Page 1: ...Toshiba Personal Computer Satellite Maintenance Manual TOSHIBA CORPORATION CONFIDENTIAL ...
Page 14: ...Chapter 1 Hardware Overview ...
Page 17: ......
Page 33: ...Chapter 2 Troubleshooting Procedures 2 ...
Page 34: ......
Page 82: ...3 Tests and Diagnostics 1 Chapter 3 Tests and Diagnostics ...
Page 98: ...3 Tests and Diagnostics 17 Memory Write Test Memory Read Write Test ...
Page 104: ...3 Tests and Diagnostics 23 2 If the Magnetic switch test pass it will show below display ...
Page 119: ...3 Tests and Diagnostics 38 If the picture shows as below it means he HDD function is NG ...
Page 123: ...Chapter 4 Replacement Procedures ...
Page 209: ...3 Thai TI Keyboard Figure TI keyboard 4 Korean KO Keyboard Figure KO keyboard ...
Page 211: ...7 Hebrew HB Keyboard Figure HB keyboard 8 Danish DM Keyboard Figure DM keyboard ...
Page 212: ...9 Swiss SW Keyboard Figure SW keyboard 10 Arabic ARE Keyboard Figure ARE keyboard ...
Page 213: ...11 Czech CZ Keyboard Figure CZ keyboard 12 Russian RU Keyboard Figure RU keyboard ...
Page 214: ...13 Portuguese PO Keyboard Figure PO keyboard 14 Slovakian SL Keyboard Figure SL keyboard ...
Page 215: ...15 Italian IT Keyboard Figure IT keyboard 16 French FR Keyboard Figure FR keyboard ...
Page 216: ...17 German GR Keyboard Figure GR keyboard 18 Greek GK Keyboard Figure GK keyboard ...
Page 217: ...19 Canada French CF Keyboard Figure CF keyboard 20 Hungarian HG Keyboard Figure HG keyboard ...
Page 218: ...21 Spanish SP Keyboard Figure SP keyboard 22 Turkish TR Keyboard Figure TR keyboard ...
Page 219: ...3 Turkish F TF F Keyboard Figure TF F keyboard 24 Swedish SD Keyboard Figure SD keyboard ...
Page 220: ...25 Belgian BE Keyboard Figure BE keyboard 26 Yugoslavian YU Keyboard Figure YU keyboard ...
Page 221: ...27 Norwegian NW Keyboard Figure NW keyboard 28 Scandinavian ND Keyboard Figure ND keyboard ...
Page 223: ...31 Japanese JP Keyboard Figure JP keyboard 32 Romania RO Keyboard Figure RO keyboard ...