Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector And Replacement Check - Toshiba T4500 User Manual

Check 7: The system board may be damaged. Replace the System PCB with a new one and test
the display again.
2.9 Status Indicator Panel Troubleshooting
To determine if the T4500/T4600 Family's Status Indicator Panel is functioning properly, perform the
following procedures. 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
Procedure 1 Diagnostic Test Program Execution Check
Execute the Status Indicator Panel Test in the Diagnostic Program. Refer to Chapter 3, Tests and
Diagnostics, 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.
Procedure 2 Connector and Replacement Check
The status indicator panel is connected to the system board. This cable may be disconnected or
damaged. Disassemble the computer 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 PCB.
If this cable is damaged, replace the status indicator panel with a new one. If the
cable is disconnected, firmly connect it. Repeat Procedure 1. If the keyboard is still
not functioning properly, perform Check 2.
Check 2: The status indicator panel controller on the system board may be damaged. Replace
the System PCB with a new one. Refer to Chapter 4, Replacement Procedures for
more information about how to replace the System PCB.
Status Indicator Panel Cable
PJ11 System PCB
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