Toshiba portege 610ct 620ct Instruction De Maintenance

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To determine if the 610CT keyboard is functioning properly, perform the following proce-
dures.  Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1:

Diagnostic Test Program Execution Check

Procedure 2:

Connector and Replacement Check

Execute the Keyboard Test in the Diagnostic Program.  Refer to chapter 3, Tests and Diag-
nostics, for more information on how to perform the test program.

If an error occurs, go to Procedure 2.  If an error does not occur, the keyboard is functioning
properly.

The keyboard is connected to the system board by a 19-pin flat cable.  The IPS is connected
to the power supply board by a 5-pin flat cable.  These cables may be disconnected or dam-
aged.  Disassemble the 610CT as described in chapter 4, Replacement Procedures, and
perform the following checks:

Check 1

Make sure the keyboard cable is not damaged and is connected to the system
board.

Keyboard                                        System board

If this cable is damaged, replace the keyboard with a new one.  If the cable is
disconnected, firmly connect it.  Perform Procedure 1 again.  If the keyboard is
still not functioning properly, perform Check 2.

Check 2

The keyboard controller on the system board may be damaged.  Replace the
system board with a new one.  Refer to chapter 4 for more information.  If the
keyboard is still not functioning properly, perform Check 3.

Check 3

Make sure the IPS cable is not damaged and is connected to the power supply
board.

         IPS                                    Power supply board

If this cable is damaged, replace the keyboard with a new one.  If the cable is
disconnected, firmly connect it.  Perform Procedure 1 again.  If the keyboard is
still not functioning properly, perform Check 4.