We had to reload an e6420 so it could be given to another employee. The wireless switch no longer works. The light on the chassis of the laptop does not light up regardless of switch position. I have checked the BIOS and it is enabled.
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Well now it's started working. I have no idea. I've rebooted the computer multiple times while installing drivers and a BIOS update and I guess THIS time it decided to behave.
Re: E6420 Wireless switch
I FIXED MINE..i had the same issue too.. Mine just showed Turn wifi back on manually, but when i switched the switched nothing happened.
what i did was go to bios setting scroll down to "wireless"...then "wireless switch",and untick WLAN
then click "wireless device enable" make sure everything is ticked
HIT APPLY then restart