Service manual

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Troubleshooting
4 – 12
LCD & system board
LCD SCREEN FAILURE TO DISPLAY
The LCD screen’s inability to display may be due to any of the following problems:
• There is bad connection between the LCD screen and the system board
• The inverter board has malfunctioned
• The LCD screen has malfunctioned
CHECKING THE LCD TO SYSTEM BOARD CONNECTION
A bad connection between the LCD screen and the system board may be the cause of the LCD screen’s failure to
display. If the LCD control signal cable is frayed or is not properly plugged into connector JLCD1 on the system
board (Figure 4-5 ), either situation may have caused the LCD not to display. Replace the cable if it is frayed or plug
it in if it is loose. If the problem still persists, proceed with the rest of the checking job.
LCD TO MAINOARD
CONNECTION
FIG. 4 – 5
JLCD1