Toshiba L600D 用户手册

To check if the computer’s 3G is malfunctioning or not, follow the troubleshooting procedure 
below as instructed. 

The 3G module is connected to system board. If 3G malfunctions, its connection is defective 
or Antenna and system board may be faulty. 

Check 1 

Make sure 3G is firmly connected to the connector CN20/CN25(system board). If 
the problem still occurs, perform Check 2. 

 

Check 2 

Antenna may be faulty. Replace it with new one. If the problem s till occurs, 
perform Check 3. 

Check 3 

3G card may be faulty. Replace it with a new one following the steps in Chapter 4. 
If the problem still occurs, perform Check 4. 

Check 4 

System board may be faulty. Replace it with a new one following the instruction in 
Chapter 4.