Toshiba PSAGAX Manual Do Utilizador

To check if the computer’s display is defective or malfunctioning, follow the troubleshooting 
procedures below as instructed.  

Procedure 1  External Monitor Check 

Procedure 2  Test Program Check 

Procedure 3  Connector Check and 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 even if resume mode is enabled. 
If the external monitor works correctly, the internal LCD, LCD/FL cable, or FL may be 
faulty.  Go to Procedure 3. 
If the external monitor appears to have the same problem as the internal monitor, the system 
board may be faulty.  Go to Procedure 2. 

Procedure 2 Test Program Check 
Insert the diagnostics bootable CD in the computer's CD ROM, turn on the computer and run 
the test.  See Chapter 3 for information on how to perform the test. 
If an error is detected in the test, go to Procedure 3.  If no error is detected, the display itself 
is normal. 
 

Procedure 3 Connector Check and Replacement Check 
The display unit has an LCD module, Fluorescent lamp (FL), panel close switch and FL 
inverter board.  Any of the components or their connections may be defective.  Disassemble 
the computer following the steps described in Chapter 4, then perform the following checks: 
(1)    If the FL does not light, perform Check 1. 
(2)    If characters or graphics are not displayed normally, perform Check 5. 
(3)    If the FL remains lit when the display is closed, the panel close switch may be 

defective.  Perform Check 8. 

 

FL

FL inverter board

System board

CPU

HV cable

LCD/FL cable