Display Troubleshooting - Toshiba T200 User Manual

2.8

Display Troubleshooting

This section describes how to determine if the display is functioning properly. Start with
Procedure 1 and continue as instructed.
Procedure 1:
Procedure 2:
Procedure 3:
Procedure 4:
Procedure 5:
Use the checklist below to determine which procedure to begin with:
Display is dark
Backlight does not light.
Characters are not displayed.
Abnormal lines are displayed.
Some pixels do not light.
If the backlight lights but no characters are displayed.
Any other problem.
Procedure 1 Brightness and Contrast Control Check
Change the brightness and contrast by tapping the adjust point of the display with the stylus.
If the brightness and contrast do not change, go to Procedure 4.
Procedure 2 External CRT Check
Connect the external CRT to the computer's external monitor port, then boot the computer.
If the external CRT works correctly, the internal LCD display may be damaged. Go to Proce-
dure 4.
If the external CRT appears to have the same problem as the internal LCD, the display con-
troller may be damaged. Go to Procedure 3.
2-26
Brightness and Contrast Control Check
External CRT Check
Diagnostic Test Program Execution Check
Connector Check
Replacement Check
: Go to Procedure 1
: Go to Procedure 4
: Go to Procedure 3
T200/T200CS