Troubleshooting - Casio QT-8000 Service Manual

8. TROUBLESHOOTING

This portion of the service manual lists all possible malfunctions that may occur when operating
the POS PC system. To assist you in fully analyzing the problem, the following table also
includes an up-to-date list of symptoms and probable cause(s). In case you encounter
problems or discover causes not included in this section, we highly recommend you to consult
CASIO engineers .
Symptoms
The power LED
indicator on the front
panel does not light up
LCD Backlight is not
bright enough.
Abnormal VGA screen
display
Loose power cable connection at the bottom of the front panel
-
¢ Turn OFF system then disconnects the power cord. Insert the
power cord back into the inlet connector then turn ON the
system Power.
The connection of female jacks to the power supply inlet
-
connector is loose.
¢ Remove the back cover of the system and check each
connection to the power supply inlet connector.
- Power supply unit is out-of-order
¢ Replace the power supply unit.
Adjust the backlight controller on the left hand side of the panel,
-
and rotate clockwise to the brightness.
Monitor cable is not properly installed to connector VGA of the
-
system.
- Please check the VGA port connection.
¢ Pull out the VGA cable from the system, then replace it back.
Defective CPU card
-
¢ Replace the CPU card of the System.
Probable Causes
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