Troubleshooting; Procedure 1 Connector Check And Replacement Check - Toshiba Satellite L640D Maintenance Manual
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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.
Procedure 1
Connector Check and Replacement Check
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.
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 L600D/L640D/L645D, Satellite Pro L600D/Pro L640D/Pro L645D Maintenance Manual (960-Q08)
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Troubleshooting
