My laptop used to connect to the wireless connection , but one day it stopped working and now i can only connect to internet using a lan cable

Hi,
you can do a quick troubleshooting on the laptop.
1. used another network cable and check that no pins are broken on the laptop.
2. go to device manager and remove the network adapter and reinstall it.

if this don't work. if you have a wireless router, you can connect to the internet over the wireless network adapter on the laptop.

good luck!!

To connect to the Internet you need a few extra things aswell as a network or wireless card and install the LAN or wireless driver.
1. You need to sign up with an Internet service provider.
2. Connect a LAN cable from your computer to the DSL or cable modem
3. You need a DSL or cable modem and connect and configure the modem to inaccordance with your Internet service provider's instructions.
4. Install Internet Explorer if it has not been done.
5. If everything has been done correctly, when you open Internet Explorer youcan access the Internet. If you have a wireless router and it is connected to the DSLor cable modem then -
To connect to yourwireless router, the router needs its wireless settings to be configuredwith the SSID, encryption key etc., also the wireless cards in all thelaptops/computers needs to be configured with these router's wireless settings.Then the laptops/desktop computers can communicate with your wireless router.

You will need a wireless router with a built in switch. Most of them these days will have a built in switch. Here is a picture detailing what I am talking about.

You're internet connection goes into the ADSL port. Now, it will be broadcast WIRELESSLY through the antenna to your laptop. With this example, you could connect 4 more WIRED computers through the LAN ports. The built in switch is the division of the connection into the separate LAN ports.

I trust that this will help you greatly and look forward to your response!

METHOD 1 - Using Internet connection using DSL or cable connection.
1st. If you wish to connect to the Internet with a LAN cable or a wirelessly and if your computer doesn't have a LAN card or wireless LAN card you need to purchase a LAN card (to configure the wireless router) and if you want a wireless connection you will also need to purchase a wireless LAN card.
2nd. You need to select an Internet Service Provider in your area with a plan and cost to suit your requirements.
3rd. You need to decide what type of broadband connection you need, DSL or cable modem with or without a built-in wireless router, the Internet Service Provider can assist you with this.
5th. The Internet Service Provider can supply these items or advise you what make and model to purchase. They will also provide information on how to connect and setup your Internet connection.

METHOD 2 - Using USB wireless adapter that plugs into the laptop's USB port. It doesn't need a wireless router or a cable or DSL modem.
This is used mostly on laptop computers which allows Internet access anywhere the Internet Service Provide has a wireless transmitter. It uses the G3 mobile system.
This type of service usually costs more and again you need to select an Internet Service Provider that can provide the wireless coverage, the plan and costs that suit your requirements.
Installation and setting up information is supplied by the ISP.

The definition of the sound card, is a chipset integrated into the main board of your laptop, in order to provide sound to your built-in speakers, or to the headphone jack on your laptop. Internet LAN (or Local Area Network) is a port located either on the side or the rear of your computer, where you would plug in a Cable/DSL High-Speed Internet connection, using an Ethernet cable (also called RJ-45). Wireless LAN is the same idea, only instead of using an ethernet cable to provide you access to the internet, it uses a wireless signal or radio frequency, to connect to a wireless access point (usually provided by a wireless router in the area). More in-depth information can be found at the following links:

Sound Cards: http://en.wikipedia.org/wiki/Sound_card
Internet LAN: http://en.wikipedia.org/wiki/Ethernet
Wireless LAN: http://en.wikipedia.org/wiki/Wireless_LAN

hi! Welcome to fixya!
You need to turn off first or disconnect LAN connection which is the cable connection before you can use the wireless connection. After that go control panel you need to setup internet connection and be sure to configure the IP address to automatic which the DHCP mode configuration then restart. That's it. Have nice day!

Check this Tip for an overview

1. Connect your PC to your router using LAN Cable: be sure you can browse internet
2. If you cannot browse check router config with your ISP
   
3. Connect to your router using IP address you find for gateway in Network status
4. Configure your router wireless section to match with your PC card
5. Start removing security, broadcast radio signal, create a simple SSID as network name
6. Check if router network is seen by your PC card (when you disconnect the LAN cable and activate the wireless card)
7. If connection is established ( near the router) try different location
8. Reconnect cable and reconfig adding security protocol (WPA-PSK recommended) use parameters compatible with your lan card
   

check your settings if you allowed more than 1 computer to connect to your router.

give up

I recently experienced this on laptop and desktop, using a lynksys wireless. I was able to go into each system to network connections, and tell it to connect. I haven't had a problem since........hope this helps you!