Toshiba satellite a20 series User Manual

This section describes how to determine if the computer’s display is functioning properly.  Start 
with Procedure 1 and continue with the other procedures as instructed.   

Procedure 1:  External Monitor Check 
Procedure 2:  Diagnostic Test Program Execution Check 
Procedure 3:  Connector and Replacement 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 damaged.  Go to Procedure 3. 

If the external monitor appears to have the same problem as the internal monitor, the system 
board may be damaged.  Go to Procedure 2. 

The Display Test program is stored on the computer’s Diagnostics disk.  This program checks the 
display controller on the system board.  Insert the Diagnostics disk in the computer’s floppy disk 
drive, 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.  If an error is not detected, the display is functioning 
properly.