Troubleshooting; Procedure 1 Connector Check And Replacement Check - Toshiba Satellite L640 Maintenance Manual

Chapter 2 Troubleshooting Procedures
2.15 3G Troubleshooting
To check if the computer's 3G is malfunctioning or not, follow the troubleshooting procedure
below as instructed.
Procedur e 1 Connector Check and Replacement Check
The 3G module is connected to system board. If 3G malfunctions, its c
or Antenna and system board may be faulty.
Check 1 Make sure 3G is firmly connected to the connec
problem still occurs, perform Check 2.
Antenna may be faulty. Replace it with new one. If the problem s till occurs,
Check 2
perform Check 3.
3G card may be faulty. Replace it with a new one following the steps in Chapter 4.
Check 3
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.
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)
onnection is defective
tor CN17 (system board). If the