Lenovo ThinkPad T420 User Manual page 229

3. Click Phone and Modem Options.
4. Click the Modems tab. The name of the modem installed in your computer is highlighted.
5. Click Properties.
6. Click the Change settings button. If you are prompted for an administrator password or confirmation,
type the password or provide confirmation.
7. Select the Advanced tab.
8. Type +PQC=3 in the Extra initialization commands: field.
9. Click OK to close the window.
For Windows XP:
1. Click Start.
2. Click Control Panel ➙ Printers and Other Hardware.
3. Click Phone and Modem Options.
4. Click the Modems tab. The name of the modem installed in your computer is highlighted.
5. Click Properties.
6. Select the Advanced tab.
7. Type +PQC=3 in the Extra initialization commands: field.
8. Click OK to close the window.
Ethernet problems
• Problem: Your computer cannot connect to the network.
Solution: Make sure that:
– The cable is installed properly.
The network cable must be securely connected both to the Ethernet connector of your computer and
to the RJ45 connector of the hub. The maximum allowable distance from the computer to hub is
100 meters. If the cable is connected and the distance is within acceptable limits but the problem
persists, try a different cable.
– You are using the correct device driver.
For Windows 7 and Windows Vista:
1. Click Start, and then click Control Panel.
2. Click Hardware and Sound.
3. Click Device Manager. If you are prompted for an administrator password or confirmation, type
the password or provide confirmation.
4. If the ! mark is to the left of the adapter name under Network adapters, you might not use the
correct driver or the driver is not enabled. To update the driver, right-click the highlighted adapter.
5. Click Update Driver Software, and then follow the instructions on the screen.
For Windows XP:
1. Click Start, and then click Control Panel.
2. Click Performance and Maintenance, and then click System.
3. Click the Hardware tab, and click the Device Manager button.
4. If the x mark is to the left of the adapter name under Network adapter, you might not use the
correct driver or the driver is not enabled. To update the driver, right-click the highlighted adapter.
5. Click Properties. The Properties window appears.
6. Click the Driver tab.
.
Chapter 10 Troubleshooting computer problems
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