Toshiba Satellite L640 User 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
onnection is defective
or Antenna and system board may be faulty.
tor CN17 (system board). If the
e 1 Connector Check and Replacement Check
The 3G module is connected to system board. If 3G malfunctions, its c
Check 1 Make sure 3G is firmly connected to the connec
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.
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)

Toshiba Satellite L640 Specifications

General

Optical Drive	DVD SuperMulti Drive
Wireless	802.11b/g/n
Webcam	Integrated Webcam
Processor	Intel Core i3/i5
RAM	Up to 8GB DDR3
Storage	320GB HDD
Display	14-inch HD
Graphics	Intel HD Graphics
Operating System	Windows 7 Home Premium
LAN	10/100 Ethernet
Battery	6-cell Lithium Ion
Ports	HDMI, VGA, RJ-45, Microphone input, Headphone output