I have a Dell Latitude D610 and I'm having trouble with wireless

The Latitude D610 does not have a wireless button.

Always use the Dell or Windows updates first. Try here: http://www.dell.com/support/drivers/us/en/04/Product/latitude-d610

Go to www.ebay.com Type bios password and choose a seller that deals in Dell.

According to the documentation for your Dell Latitude D610, you can turn its wireless networking function on and off by pressing the <Fn><F2> key combination.
Dell D610 User's Guide

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Are you running the Dell Wireless Utility? Try stopping that service (go into Services, find the Dell program on the list, and Stop it, and then change the startup type to Manual) and start the Wireless Zero service (and change the startup type to Automatic).

When the Wireless Zero service is running, open your wireless networks list and see if you can see any networks (assuming there are some nearby to find). If you get a message that says something like "Wireless Zero is not configured to manage your network connections," go into the Advanced properties and put a check next to the box that says "Allow Wireless Zero to manage my wireless networks").

If you still can't see any wireless networks when there are some around, then maybe you do have a damaged antenna. It's probably not worth spending the money for parts and labor to have it repaired or replaced, especially if your computer is five years old.

Go to this website. You can either download an html format or pdf format of the document. Cheers!http://support.dell.com/support/edocs/systems/latd610/en/index.htm

Hello, most common Wi Fi- Adapter for your notebook is:

Intels Pro-Wireless-2200BG

download driver here:

http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=1637

Remove all drives, Memory and wireless cards, see if the indication changes. If no change, replace the motherboard. If they change, add memory back one module at a time, see if the system will post. If one does, then the other is bad.

Dell Latitude D610 User's Guide
Dell Latitude D610 Service Manual

In the BIOS, does it show the battery and it's current state? As weird as it sounds, I've fixed an issue like this on a D600 by updating the BIOS to the most current level. Weird, but true.