Toshiba PORTEGE M400 User Manual
Page 103
2.17 Wireless LAN Troubleshooting
2 Troubleshooting
Procedure 2
Check of Antenna connection
The wireless LAN functional wiring diagram is shown below:
Any of the connections may be disconnected. Disassemble the computer following the steps
described in Chapter 4, and perform the following checks:
Check 1
The wireless LAN card and the System board may be disconnected. Make sure the
wireless LAN card is firmly connected to the CN2600 of the System board.
If the board connector is disconnected, connect it firmly and return to Procedure 1.
If there is still an error, go to Check 2.
Check 2
Make sure the wireless LAN antennas (black and white) are firmly connected to
the Wireless LAN card. If the antennas are disconnected, connect firmly then
return to Procedure 1. If there is still an error, perform Procedure 3.
Procedure 3
Replacement Check
Check if the wireless LAN card and the System board are connected properly. If they are
properly connected but there is stall an error, any of these components may be damaged.
Disassemble the computer following the steps described in Chapter 4 and replace the board
with a new one.
Check 1
The wireless LAN card may be defective or damaged. Disassemble the computer
following the steps described in Chapter 4 and replace the board with a new one. If
there is still an error go to Check 2.
Check 2
The wireless LAN antennas may be defective or damaged. Disassemble the
computer following the steps described in Chapter 4 and replace the board with a
new one. If there is still an error go to Check 3.
Check 3
The System board may be defective or damaged. Disassemble the computer
following the steps described in Chapter 4 and replace the board with a new one.
PORTEGE M400 Maintenance Manual (960-541)
[CONFIDENTIAL]
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