Laptop Network Adapter No Longer Detected

Hi all,

I have an Inspiron 640m laptop, running Windows Vista. It has been connecting to wireless just fine for over a year, but it took a rather hard fall, and now it does not detect any wireless networks, at home or anywhere else where I used to connect wirelessly. If I click "Diagnose why Windows cannot find any additional networks", I receive the message "This computer does not have a wireless network adapter installed and configured," and my Wireless adapter is no longer listed under Network Connections.

In Device Manager, under network adapter I have listed "Broadcom 440x10/100 Integrated Controller." Following a troubleshooting guide, I tried uninstalling this and restarting the computer, so that it would auto-detect upon reboot, but it seemed to reinstall itself a few seconds after I uninstalled, before I could reboot, and when I restarted nothing changed.

I also tried installing the most recent driver associated with my WLAN MiniCard, but received the message that "No compatible hardware was found."

Since the wireless was working fine before I dropped the laptop and the next time I used it it was like this, I'm pretty sure it is a problem with the network adapter itself; be it jostled or altogether dead, but I have no idea what to do with this information.

Many thanks in advance :)

Edit: Perhaps I should also mention: I can still connect to the internet via ethernet cable with no problems.