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I've a HP G42 laptop. Normally I use Internet using WiFi. It has a Broadcom 802.11n network adapter.

Today I was browsing and suddenly my PC restarted, after that I tried to turn on WiFi but it won't turn on.

The wireless switch key(F12) works well (turns orange when wireless is off and white when it's on). But within Windows 10, it's always off.

I've tried switching it from Win10 settings app, but the WiFi switch elastically falls back to off state every time I click it.

I've tried updating my Broadcom driver which I downloaded in my phone (yes, Wifi works on other devices) but no change.

Diagnosing & troubleshooting says that to turn on WiFi but how can I start a thing which is broken itself? Tried dual-booting Win7 from another drive but the case is exactly same.

Maybe it's a hardware issue, but I'm not sure.

  • If you have the same issue on Windows 7 as on Windows 10, then it is very likely that the wifi hardware is broken. See if you have warrantee – LPChip Apr 6 '17 at 10:28
  • I once fought a similar problem.It turned out the machine also had a hardware switch for the wireless. – Lenne Apr 6 '17 at 10:52
  • @Lenne the hardware switch is the key F12. OP mentions it has tried that already. – LPChip Apr 6 '17 at 11:25
  • F12 is a software-switch. There could be a hardware switch too. – Lenne Apr 6 '17 at 12:33
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  1. Check that there is no hardware WiFi switch (like a sliding button on the edge of the laptop, or a press button) that you would have touched accidentally.

  2. Try accessing your BIOS when starting the computer, and check in it that the WLAN (WiFi) is turned on.

  3. In Windows 7: Start > Computer (right click) > Manage > Device Manager > Network cards. If the driver is installed, your wireless card should be listed here. (The procedure should not be much different in Windows 10.)

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  • True. It could have a hardware switch that is a point to look into – arthur kamande Apr 6 '17 at 13:03
  • There's no H/W or physical switch. – Abrar Borno Apr 6 '17 at 14:08
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In control panel go to device manager . Uninstall the wireless device DO NOT click "delete driver software for this device". Device manager wifi adapter Restart the PC then go back to device manager in click file then click scan for hardware changes this should resolve your issue Scan for hardware changes

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  • I have used it on many machines to reset the wifi unless it is a hardware issue this solves it each time . Had a similar issue a while back. But alas it looses all your wifi passwords but at least it works. I think it an internal misconfiguration that affects wifi nic cards – arthur kamande Apr 6 '17 at 13:02
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this one is an old post but may be useful my answer for another one...if you have some hardware knowledge find the WiFi card and remove it and start your machine.shutdown again and refit the card. start the machine and check the result...

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  • Why would this (possibly) help? – Pierre.Vriens Jan 23 '18 at 9:34

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