2.8 Display Troubleshooting
2 Troubleshooting Procedures
Satellite A50/TECRA A2 Maintenance Manual (960-478)
2-41
Procedure 3
Replacement Check
The display unit has an FL inverter board, Display module, System board, LCD harness
and Display ON/OFF switch. Any of the components may be damaged. Disassemble the
computer following the steps described in Chapter 4,
Replacement Procedures
?
then
perform the following checks:
If characters or graphics are not displayed on the internal display, perform Check 1.
If characters are displayed on the internal display but the display is not normal, perform
Check 2.
If characters are displayed on the internal display but the display is dark (the back-light
does not light), perform Check 5.
Check 1
The display ON/OFF switch may be damaged. Remove the display ON/OFF
switch and repeat Procedure 4. If there is still an error, go to Check 2.
Check 2
The LCD harness may be damaged. Replace the damaged harness with a new
one and repeat Procedure 4. If there is still an error, go to Check 3.
Check 3
The display module may be damaged. Replace it with a new one and repeat
Procedure 4. If there is still an error, go to Check 4.
Check 4
The FL inverter board may be damaged. Replace it with a new one and repeat
Procedure 4. If there is still an error, go to Check 5.
Check 5
The FL tube may be damaged. Replace it with a new one and repeat Procedure
4. If there is still an error, go to Check 6.
Check 6
The display controller of the system board may be damaged. Replace the
system board with a new one.
Summary of Contents for Tecra A2 Series
Page 10: ...x Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 11: ...Chapter 1 Hardware Overview ...
Page 49: ...Chapter 2 Troubleshooting Procedures ...
Page 50: ...2 Troubleshooting Procedures 2 ii Satellite A50 TECRA A2 Maintenance Manual 960 478 2 ...
Page 54: ...2 Troubleshooting Procedures 2 vi Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 105: ...Chapter 3 Tests and Diagnostics ...
Page 106: ...3 Tests and Diagnostics 3 ii Satellite A50 TECRA A2 Maintenance Manual 960 478 3 ...
Page 197: ...Chapter 4 Replacement Procedures ...
Page 198: ...4 Replacement Procedures 4 ii Satellite A50 TECRA A2 Maintenance Manual 960 478 4 ...
Page 204: ...4 Replacement Procedures 4 viii Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 271: ...Appendices ...
Page 272: ...Appendices App ii Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 290: ...Appendices Apx B Board Layout B 6 Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 332: ...Appendices Apx E Key Layout E 2 Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 334: ...Appendices Apx F Wiring Diagrams F 2 Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 336: ...Appendices Apx G BIOS KBC EC Update G 2 Satellite A50 TECRA A2 Maintenance Manual 960 478 ...
Page 338: ...Appendices Apx H Reliability H 2 Satellite A50 TECRA A2 Maintenance Manual 960 478 ...