Procedure 2; Antennas' Connection Check - Toshiba Satellite U400 Maintenance Manual

Procedure 2

The wireless LAN function-wiring diagram is shown below:
Any of the connections may be defective. Disassemble the computer following the steps
described in Chapter 4, Replacement Procedures, and perform the following checks:
Check 1 Make sure the wireless communication switch is "On".
If the switch is "Off", turn it "On". If the problem still occurs, perform Check 2.
Check 2 Make sure wireless LAN card (Mini-PCI) is firmly connected to the CN2200 on
system board. If the connector is defective, connect it firmly and perform
Procedure 1. If the problem still occurs, perform Check 3.
Check 3 Make sure that wireless LAN antenna cables (black and white) are firmly
connected to the connectors on Wireless LAN card. If wireless LAN antenna
cables are not connected properly, connect them firmly and perform Procedure 1.
If the problem still occurs, go to the procedure 3.
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Antennas' Connection Check

Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Chapter2Troubleshooting Procedures