Toshiba Satellite U500 Maintenance Manual page 66

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 or AccuPoint malfunctions, start with Check 1.
2. If the touch pad malfunctions, start with Check 3.
3. If the power switch, InTouch button or Presentation button malfunctions, start with
Check 5.
Check 1 Make sure the keyboard cable is securely connected to CON4801 on the main
board.
If the connection is loose, reconnect firmly. 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 5.
Check 3 Make sure the touch pad cable is firmly connected to A1tp_Con1 on the touch pad
board.
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