Toshiba Portege R300 Maintenance Manual page 88

2 Troubleshooting Procedures
Procedure 2 Connector Check and Replacement Check
The keyboard, touch pad or sensor/switch board may be disconnected or damaged.
Disassemble the computer following the steps described in Chapter 4, Replacement
Procedures, and perform the following checks:
1. If the keyboard malfunctions, start with Check 1.
2. If the touch pad malfunctions, start with Check 3.
3. If the SW membrane malfunctions, start with Check 6.
Check 1 Make sure the keyboard cable is securely connected to CN3230 on the system
board.
If the connection is loose, reconnect firmly and go to Procedure 1. If there is still
an error, go to Check 2.
Check 2 The keyboard or its cable may be damaged. Replace it with a new one following
the instructions in Chapter 4, Replacement Procedures. If the problem still exists,
perform Check 6.
Check 3 Make sure the touch pad SW cable is firmly connected to CN3240 on the system
board.
If the connection is loose, reconnect firmly and go to Procedure 1. If there is still
an error, go to Check 4.
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