DESK TOP TO WIRELESS CONNECTION

yes its work..if *********** board hv any usb port

The cable connect the monitor to the computer you can check it by making sure it is connect properly,unplug it and then plug it back again because it may not be properly connected.

Try going to Network and Sharing Center - Manage Network Connections. Click on the connection and enable it.
Also try Network and Sharing Center - Manage Wireless Connections, and moving the wireless connection you'd like to use and move it to the top of the list. Select any operations that will enable or connect to the network.

Make sure the Belkin wireless is the only device directly connecting to your internet service provider's router/modem. Usually that port is labelled "WAN" or even "Internet". The Belkin should have extra ports/jacks for WIRED connections, right? You then connect the PC into the other remaining ports/jacks on the Belkin (if they're wired) or just use the wireless for the laptop if the laptop has wireless. After getting the wireless going, though, you should lock it down by using WPA encryption key if possible.

Most of the connections only fit in one place ...

Here is the Service Manaul for the 2400 Dimension.

http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/index.htm

Reinstall your drivers you'll find them in your control panel

Hi Whitney,

I was able to locate manual and a troubleshooting guide.

1. Manual
2. Troubleshooting Guide

Summary: Your modem only supports 802.11b standard, which limits the throughput to max. 11Mbps (compare to 802.11g = 54Mbps, 802.11n = 108 Mbps). In other words: your connection is only about 10% of the speed compared to a wired connection via Ethernet cable (100 Mbps). So - if you can - you should try to use a wired instead of a wireless connection, but you have to decide what makes is more important to you: having no cable and you can be away from the modem or the connection speed.

This also means - and that is in regards to APremkumar's solution - that you can skip all 802.11n adapters (this would just be a waste of money). Since you will not find an adapter that only connects to a class b network, look for something like "802.11b/g".
An example page is here. You can choose between an internal (PCI card) or external (USB adapter) solution. Both are ok and the decision depends on the availablity of a free USB port on your Dell and your comfort of opening the computer case or not. (You can always come back here and ask for help;-)

If you have any more questions, please let me know - I'm happy to help!

You can add one via a USB port like THESE

Or you can add one to an empty PCI slot on your motherboard if you have one available. Like This One

This machine will support up to 32bit maximum pci expansion card speed.  So it should work. http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/specs.htm

Less expensive for recieving is simply the "usb stick" I would recommand a "ralink" chipset, (can be found in USROBOTICS and some less expensive brand like TOPLINK