Dell Inspiron 5547 won't detect wireless network adapter

[Vanille]

My Dell Inspiron won't connect to the internet via WI-Fi. But all other devices connect to it just fine.
I can only get access to the internet using an Ethernet cable.

I had this problem before, but it just magically solved itself after about 20 minutes of not doing anything. But it's been a whole day now, and nothing seems to work.

When I go on device manager, under Network adapter, it only lists one:
Realtek PCIe FE Family Controller
And there's no exclamation mark or anything beside it.

I've tried:
-Restarting the computer
-System restore
-Restarting router
-System BIOS boot (A Dell representative walked me through the process)
-Download and installed wireless network driver adapters from Dell support page
-In device manager, tried to 'Scan for hardware changes'

Any help would be greatly appreciated in solving this mystery!

edit: Airplane mode is off

 

[big8]

Did you turn Airplane Mode on?

 

[Vanille]

No, Airplan mode is off xD
I should have mentioned that earlier

 

[popeye]

Well, can't rule out a bad card. They are fairly cheap and easy to replace in most cases, just be sure to get a Dell compatible one. There are also USB options.

Check to make sure the adapter is seated securely in the slot.

Maybe take it somewhere to see if it will connect to a hot spot. I doubt it though if the adapter doesn't appear in Device Manager.

 

[click312]

I'm also experiencing this. Any solution?
does my wireless card is broken?
do i have to open and reposition or replace the card?

 

[Ztruker]

• Boot your computer and create a new Environment variable called devmgr_show_nonpresent_devices and set it's value to 1 as follows:
  • Right click on Computer and select Properties
  • Click on Advanced System Settings in left pane.
  • Click on the Environmental Variables button
  • Click the New button under the User variables for xxxxx" area.
  • Set the Variable name as: devmgr_show_nonpresent_devices
  • Set the Variable value to: 1
  • Click OK as needed to close all the windows you opened.
• Open Device Manager (Control Panel, System, Hardware tab, Device Manager)
• Click on View then Show hidden devices.

See what, if any, yellow marks show.

 

[click312]

• Boot your computer and create a new Environment variable called devmgr_show_nonpresent_devices and set it's value to 1 as follows:
  • Right click on Computer and select Properties
  • Click on Advanced System Settings in left pane.
  • Click on the Environmental Variables button
  • Click the New button under the User variables for xxxxx" area.
  • Set the Variable name as: devmgr_show_nonpresent_devices
  • Set the Variable value to: 1
  • Click OK as needed to close all the windows you opened.
• Open Device Manager (Control Panel, System, Hardware tab, Device Manager)
• Click on View then Show hidden devices.

See what, if any, yellow marks show.

I'ma give it a try, after i finish windows update. will update after. thanks!

 

[click312]

• Boot your computer and create a new Environment variable called devmgr_show_nonpresent_devices and set it's value to 1 as follows:
  • Right click on Computer and select Properties
  • Click on Advanced System Settings in left pane.
  • Click on the Environmental Variables button
  • Click the New button under the User variables for xxxxx" area.
  • Set the Variable name as: devmgr_show_nonpresent_devices
  • Set the Variable value to: 1
  • Click OK as needed to close all the windows you opened.
• Open Device Manager (Control Panel, System, Hardware tab, Device Manager)
• Click on View then Show hidden devices.

See what, if any, yellow marks show.

hi there, i tried the one u suggested. and i saw my intel(r) dual band wireless-ac130 now on the device manager. though its not on yellow mark, but it says that "Currently, this hardware device is not connected to the computer. (Code 45)" Why is it saying that way?
I haven't opened my laptop how come my wireless card is not connected.

 

[click312]

I opened my laptop and remove the card and put it back after a minute, still it cant be recognized. is it my card is broken? but i haven't drop my laptop and also took care of it. how did this happen? disappointed with dell.

I also checked the bios, and i haven't found the wireless connection, to check if its enabled or disabled.

 

[Ztruker]

Does the laptop have a switch to turn the wireless on and off or a Fn key to do so? Maybe it's simply turned off.

 

[click312]

checked that as well. i never turned on my airplane mode, it's always off.
so disappointed with dell.

 

[Ztruker]

Not airplane mode, wireless on/off. According to the Quick Setup Guide: