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The Dell Inspiron can be identified by its model number: P57G. It's a 3.3-inch multi touch 2-in-1 laptop that was released in 2010. The Dell Inspiron is a 2.2 GHz Intel Core i5-5200U, 4GB of 1600MHz DDR3L RAM, and HD 1366 x 768 native resolution.

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Why sill the Laptop not connect to 5GHz network

I have a Dell Inspiron 7347 laptop that will not connect to a 2.4 GHz or a 5.2 GHz WiFi network, I am currently using a external WiFi Adapter

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Hi @joshuaelli27289

Are 2.4GHz and 5GHz networks being detected OK by the laptop's WiFi but just not connecting or aren't they being detected at all?

If detecting but not connecting, have you tried the Windows Network troubleshooter? Go to Settings → Troubleshoot → Additional Troubleshooters → Incoming Connections

If not detecting at all, try using the laptop's WiFi as close as possible to your home network router i.e. <20cm and check if it detects and connects OK.

If it does then it may be a loose antenna that is the problem. See the service manual link info below about replacing the WLAN card to check if the antennas are OK

If still not check the status of the WLAN adapter in Device Manager and see if it is installed OK.

Go to Device Manager → Network Adapters.

If there is a red cross next to the wireless adapter¹ entry in the category, right click on the entry → enable device and check if it works OK.

If there's a yellow exclamation make next to the wireless adapter entry in the category, right click on the entry → update drivers and follow the prompts. You need to be online for this to work.

To get to Device Manager in Win10, press the Win key and the x key (both together) and click on the Device Manager link in the menu box that opens.

¹ There are 7 different wireless cards that can be used in this model and not all of them are dual frequency i.e. 2.4GHz and 5 GHz some are 2.4GHz only. Has the 5GHz WiFi worked OK before? They are Dell 1704, 1707, 1708 and Intel 3160, 3165, 7260, 7265,

If there is no WLAN entry in the category, click on Device Manager header → View → Show hidden devices and check if it appears, or check if there's an Other Devices category and see if it is listed there.

If there is no WLAN device listed at all in Device Manager, check that the WLAN enable/disable option (if there is one) has not been disabled in BIOS.

If still no good it may be a faulty WLAN card. Here's the service manual for the laptop. Go to p.27 to view the procedure to remove/replace the wireless card.

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