Touchpad; Procedure 1 Test Program Check; Procedure 2 Connector Check And Replacement Check - Toshiba Satellite C850D Maintenance Manual

2.12 Touchpad

2.12 Touchpad

To check if the computer's Touchpad is defective or malfunctioning, follow troubleshooting
procedures below as instructed.

Procedure 1 Test Program Check

Procedure 2 Connector Check and Replacement Check

Procedure 1 Test Program Check

Execute Touchpad Test Program available as part of the maintenance test program. This test
program checks Touchpad Module. Insert the diagnostics bootable CD in the computer's
CD/DVD device, turn on the computer and run the test. See Chapter 3 for information on
how to perform the test. If any error is detected by the test, go to Procedure 2. If an error is
not located, Touchpad itself is normal.

Procedure 2 Connector Check and Replacement Check

Touchpad Module is connected to the system board through FPC Cable. If Touchpad Module
malfunctions, there may be a bad connection between Touchpad Module and System Board,
or either might be faulty. Disassemble the computer following the steps described in Chapter
4 and perform the following checks:
Check 1 Make sure Touchpad Module has been firmly connected to the connector
on System Board. Also make sure the tape is not stuck to any part of
Touchpad Module and Touchpad Module is free of foreign matters.
Touchpad
Module
And if the connector is disconnected, connect it firmly to the system board
and return to Procedure 1. If the tape is stuck to any part of Touchpad, stick it
back to the specified point and if a foreign matter is found on Touchpad,
remove it and then return to Procedure 1. If there is still an error, perform
Check 2.
Check 2 Touchpad Module may be faulty. Replace it with a new one following the
steps described in Chapter 4. If Touchpad Module replaced is still not
functioning properly, perform Check 3.
Check 3 System Board may be defective. Replace System Board with a new one
following the steps described in Chapter 4. If the problem persists, , , ,
perform Check 4.
Check 4 CPU may be faulty. Disassemble the computer following the steps
described in Chapter 4 and replace CPU with a new one.
Satellite/Satellite Pro/C850D/C855D/L850D/L855D Maintenance Manual
System Board
2 Troubleshooting
CPU
2-23