Toshiba L600D Benutzerhandbuch

HDMI signals are connected to display circuits via HDMI cable and HDMI&USB board. Any 
of these components may be faulty. Refer to Chapter 4, Replacement Procedures, for 
instructions on how to disassemble the computer and then perform the following checks: 

If characters or graphics on the internal display are not displayed clearly, perform 
Check 1. 

If some screen functions do not operate properly, perform Check 4. 

Check 1 

HDMI cable may be faulty. Replace HDMI cable with a new one following the 
instructions in Chapter 1, Replacement Procedure and test the display again. If the 
problem still occurs, perform Check 2. 

Check 2 

HDMI monitor may be faulty. Replace HDMI monitor with a new one following 
the instructions in Chapter 2, Replacement Procedure and test the display again.  If 
the problem still occurs, perform Check 3 

Check 3 

HDMI&USB board may be faulty. Replace it with a new one following the 
instructions in Chapter 3, Replacement Procedure. 

Check 4 

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