2.9 Display Troubleshooting
2 Troubleshooting Procedures
2-42
PORTEGE M300 Maintenance Manual (960-504)
2.9 Display Troubleshooting
To check if the computer’s display is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: External Monitor Check
Procedure 2: Diagnostic Test Program Execution Check
Procedure 3: Connector and Cable Check
Procedure 4: Replacement Check
Procedure 1
External Monitor Check
Connect an external monitor to the computer’s external monitor port, then boot the computer.
The computer automatically detects the external monitor.
If the external monitor works correctly, the internal LCD may be faulty. Go to Procedure 3.
If the external monitor appears to have the same problem as the internal monitor, system
board may be faulty. Go to Procedure 2.
Procedure 2
Diagnostic Test Program Execution Check
The Display Test program is stored in Diagnostics disk. This program checks the display
controller on system board. Insert the Diagnostics disk in the USB FDD, turn on the
computer and run the test. Refer to Chapter 3,
Tests and Diagnostics
for details. If an error is
detected, go to Procedure 3.
Summary of Contents for Portege M300
Page 10: ...x PORTEGE M300 Maintenance Manual 960 504 ...
Page 43: ...Chapter 2 Troubleshooting Procedures ...
Page 44: ...2 Troubleshooting Procedures 2 ii PORTEGE M300 Maintenance Manual 960 504 ...
Page 49: ...2 Troubleshooting Procedures PORTEGE M300 Maintenance Manual 960 504 2 vii ...
Page 106: ...PORTEGE M300 Maintenance Manual 960 504 3 i Chapter 3 Tests and Diagnostics ...
Page 107: ...3 ii PORTEGE M300 Maintenance Manual 960 504 ...
Page 112: ...PORTEGE M300 Maintenance Manual 960 504 3 vii ...
Page 226: ...3 32 SETUP 3 Tests and Diagnostics 3 110 PORTEGE M300 Maintenance Manual 960 504 ...
Page 227: ...Chapter 4 Replacement Procedures ...
Page 228: ...4 Replacement Procedures 4 ii PORTEGE M300 Maintenance Manual 960 504 ...
Page 232: ...4 Replacement Procedures 4 vi PORTEGE M300 Maintenance Manual 960 504 ...
Page 313: ...Appendices ...
Page 314: ...Appendices App ii PORTEGE M300 Maintenance Manual 960 504 ...
Page 320: ...Appendices App viii PORTEGE M300 Maintenance Manual 960 504 ...
Page 326: ...Appendix A Handling the LCD Module A 6 PORTEGE M300 Maintenance Manual 960 504 ...
Page 332: ...B 3 HDD FPC View FNCHD Appendix B Board Layout B 6 PORTEGE M300 Maintenance Manual 960 504 ...
Page 368: ...Appendix E Key Layout E 2 PORTEGE M300 Maintenance Manual 960 504 ...
Page 370: ...Appendix E Key Layout E 2 PORTEGE M300 Maintenance Manual 960 504 ...
Page 374: ...Appendix G BIOS Rewrite Procedures G 2 PORTEGE M300 Maintenance Manual 960 504 ...
Page 376: ...Appendix G BIOS Rewrite Procedures G 2 PORTEGE M300 Maintenance Manual 960 504 ...
Page 378: ...Appendix H EC KBC Rewrite Procedures H 2 PORTEGE M300 Maintenance Manual 960 504 ...
Page 380: ...Appendix I Reliability I 2 PORTEGE M300 Maintenance Manual 960 504 ...