Toshiba Satellite U840 Maintenance Manual page 60

Troubleshooting Procedures
Procedure 3
Wireless LAN/Bluetooth card, wireless LAN/Bluetooth antenna or system board may be
faulty. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble
the computer and then perform the following checks:
Check 1 Wireless LAN/Bluetooth antenna may be faulty. Replace it with a new one
following the instructions in Chapter 4, Replacement Procedures. If the problem
still occurs, perform Check 2.
Check 2 Wireless LAN/Bluetooth card may be faulty. Replace it with a new one following
the instructions in Chapter 4, Replacement Procedures. If the problem still occurs,
perform Check 3.
Check3 System board may be faulty. Replace it with a new one following the instructions
in Chapter 4, Replacement Procedures.
Satellite U840 Maintenance Manual (960-Q08)
Replacement Check
34