Can't connect to wi-fi with dell latitude e6420

[Richard Pretti]

The internet connection on that laptop was working a few weeks ago, but when I put it to hibernate, it couldn't connect. I installed a network driver, but after that I troubleshooted and it said I needed an Ethernet cable. I tried playing around with the WI-FI switch but here's the thing: the light indicator won't go on. Any help is appreciated.

 

[popatim]

Have you tried shutting it completely down, removing the ac charger and battery, hold thepower button in for a full minute and then reconnecting things and booting back up?

 

[Richard Pretti]

Didn't work.

But I found that my network drivers were uninstalled. Is there anyway to reinstall them?

 

[popatim]

yes, download them and install them. It should be in the modem/communications section.
http://www.dell.com/support/home/us/en/04/product-support/product/latitude-e6420/drivers

 

[feruz_]

I know my answer came years late, but it is just for those who is still having the same problem like all the commenters here and using the same model e6420 with i5 running.
I had the same exact the same problem with you guys. I've tried everything, from uninstall/install drivers, finding the right drivers, even upgrade to windows 8, then 10 and then to 7(64bit) and finally to 7(32bit) without even any trace of success. I've tried all the suggestions from almost all the forums in the internet without any success.

Finally, finally.... just a few minutes ago, i found the actual problem. It lies in the hardware. My lappy dont even detect the network adaptor in Device Manager.
I had some old laptops which i have scrapped and savaged some of the parts, and so I just took out it's WLAN adaptor and put it on my e6420. Bang!! i can straight away see all my neighbours network.
Conclusion - the adaptor that came with e6420 is just not compatible (device manager cant even see it) or all this model Intel (Centrino 6200/6300) is just complete crap. There are thousands who wrote in the forums complaining about this problem, yet Dell and Intel reps just gave a generic troubleshooting solution which dont actually never solve anything.