Wireless adapter does not work

SOURCE: Latitude D600 Network problem

unplug roughter then back in after 1 min and modem ok then rebooot give it a min

SOURCE: wireless card in E1505 Dell not finding networks in range

The 1390 WLAN Minicard may not be configured to communicate with your wireless router.
Check the wireless router settings, (check the wireless settings on your other computer) and configure the 1390 WLAN with the same settings eg. SSID, WEP/WAP encryption, etc.
Is MAC address filtering enabled on your wireless router, if so add the MAC address of the 1390 WLAN to the MAC address list in the wireless router.

Check the TCP/IP properties of the 1390 WLAN card the Internet protocol should not have a fixed IP address, set it to Obtain an IP address automatically including the DNS.

Use the Ipconfig command to see the IP configuration of the network cards.

Use the Ping command to see if you can communicate with wireless router.

SOURCE: Dell Inspiron 6400 - Wireless Adapter Problems

Broadcom is not wireless, but the normal ethernet controller.
You should go to intel / your laptop manufactuer website and download the appropriate drivers.

SOURCE: dell wireless 1395 adapter not work on my laptop

Uninstall the existing drivers in device manager (RH click on my computer, go to manage, device manager.)

Go to
http://support.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R174292&SystemID=INS_PNT_PM_1525&servicetag=&os=WLH&osl=en&deviceid=15680&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=1&libid=5&fileid=236824 (PASTE THIS LINK INTO YOU BROWSER)



Hard Drive Installation (via WinZip) with Setup.exe File for R174292.exe

Download

1.Click Download Now, to download the file.
2.When the File Download window appears, click Save (Windows XP
users will click Save) this program to disk and click OK. The Save In:
window appears.
3.From the Save In: field, click the down arrow then click to
select Desktop and click Save. The file will download to your desktop.
4.If the Download Complete window appears, click Close. The file
icon appears on your desktop.

Install

1.Double-click the new icon on the desktop labeled R174292.exe.
2.The Self-Extracting window appears and prompts you to extract or
unzip to C:\DELL\DRIVERS\R174292. Write down this path so the executable (I.e.
Setup.exe) file can be found later.
3.The Self-Extractor window appears.
4.Click OK.
5.After completing the file extraction, if the Self-Extractor
window is still open, close it.
6.Click the Start button and then click Run.
7.Type C:\DELL\DRIVERS\R174292 in the Open textbox and then click OK.
8.Follow the on-screen installation instructions.

SOURCE: Dell Inspiron E1505 will not connect to wireless network

to turn on press the FN button and the F2 button at the same time and you will see the wireless light go on. then you will find a wireless signal.
hope this helps.