2.14 USB Port 2 Troubleshooting
Satellite/Satellite Pro/C850D/C855D/L850D/L855D Maintenance Manual 2-25
2.14 USB Port
To determine if the computer’s USB Port is functioning properly or malfunctions, perform
following procedures. Start with Procedure 1 and continue with the other procedure as
instruction below.
Procedure 1 Windows Application Test
Procedure 2 Connector Check and Replacement Check
Procedure 1 Windows Application Test
The USB Port Connector is mounted on System Board. Connect a USB device with USB
interface to the computer’s USB port, then power on the computer into Windows. The
computer will automatically detect this USB device through USB Port. If the USB device
appears to have a certain problem, go to Procedure 2. If an error is not located, USB Port is
functioning properly.
Procedure 2 Connector Check and Replacement Check
If USB Port on System Board malfunctions, there may be a bad connection between USB
device and System Board, or either of System Board and CPU might be faulty. Disassemble
the computer following the steps described in Chapter 4 and perform the following checks:
Check 1 Make sure USB device cable has been firmly connected to USB Port of
System Board. Also make sure USB Port on System Board is free of
foreign matters.
And if the connector is disconnected, connect it firmly to the system board
and return to Procedure 1. If a foreign matter is found on USB Port of System
Board, remove it and then return to Procedure 1. If the problem persists,
perform Check 2.
Check 2 System Board may be faulty. Replace it with a new one following the steps
described in Chapter 4. If USB Port is still not functioning properly,
perform Check 3.
Check 3 CPU may be defective. Disassemble the computer following the steps
described in Chapter 4 and replace CPU with a new one.
USB Port
System Board
CPU
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