Toshiba PRO L645 Manual Do Utilizador

To check if the computer’s CRT is malfunctioning or not, follow the troubleshooting 
procedures below as instructed. 

Procedure 2:  Connector and Cable Check 

Connect an external monitor to the computer’s external CRT port, and then to see if you can 

a

nnected to system board by a CRT cable. Their cables may be disconnected 

If the connection is loose, reconnect firmly and restart the computer. If the problem still 
occurs, go to

 

Procedure 3. 

Procedure 1:  External Monitor Check 

Procedure 3:  Replacement Check 

transfer video im ge to external monitor. If not, go procedure2.  

CRT board is co
from system board. Disassemble the computer following the steps described in Chapter 4, 
Replacement Procedures. 

 

Check 1 

 cable with a new one following the 

instructions in Chapter 4--Replacement Procedure, and then test again. If the 

Check 2 

may be faulty. Replace CRT board with a new one following the 

instructions in Chapter 4, Replacement Procedure, and then test again.  If the 
problem still occurs, perform Check 3. 

heck 3 

System board may be faulty. Replace it with a new one following the instructions 
in Chapter 4, Replacement Procedure. 

CRT cable may be faulty. Replace CRT

problem still occurs, perform Check 2. 

CRT board 

C