Devices won't connect to Wireless Network (2.4GHz b/g/n), only Wireless Network (5GHz a/n/ac).

I have the exact same problem. Can't seem to find a definitive (or even a temporary solution) to this problem.

Were you able to resolve the issue?

Please post about this here for your model router:
https://community.netgear.com/t5/Nighthawk-WiFi-Routers/bd-p/home-wifi-routers-nighthawk
You might try Voxels 3rd party FW as well. 
Good Luck. 

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Sebas91 wrote:

I have a C7800 – Nighthawk X4S—AC3200 WiFi Cable Modem Router (Firmware Version V3.01.38) that I bought December 4, 2018 (76 days ago). It seems to have lost the 2.4GHz connection. The 5GHz works just fine but every time I try to connect to the 2.4GHz it simply says "Incorrect password for network 'NAME'", "MAC Address Filtering Check FAILED", or it just straight up tries to connect and just ignores the connection after a few seconds without displaying anything. Before trying to contact NETGEAR tech support I did research trying different options from disconnecting chromecast devices to doing a physical and automatic FACTORY RESET of my product. It is still giving me the same problem. It's frustrating, I have multiple devices that only work on a 2.6GHz connection and I assumed that a $400 product wouldn't give me so much trouble. 

 

I just finished talking with multiple NETGEAR tech support representatives but they all seem to loop around the problem and never get on the same page, I assume:

1) they don't understand the problem or 2) they don't have an actual solution. 

I understand that they are most likely following a script that tells them step by step troubleshooting steps but I feel like if I have already done those steps they should acknowledge it and maybe try other options, or at least realize that the troubleshooting steps are going to disconnect me. 

 

So far all of my tech support chats have closed due to loss of connection because of the troubleshooting steps they recommend, I have made it clear to them that the step will disconnect us but I proceed anyway to make sure that I have actually followed everything NETGEAR is telling me. So far the tech support guys and gals have not told me something I haven't tried. I guess these forums are my last resort before just giving up on this product/brand. If anyone knows a proper solution to this please let me know, it seems like it's no longer a software/settings problem but it might be the actual hardware which is ridiculous because the product isn't even 3 months old yet. 

 

Troubleshooting steps I have tried: 

- Restart router 

-Turn router off for 30 / 90 seconds. Turn it back on.

-Factory Reset

-Change SSID / Password of Network.

-Try connecting on another device (have tried multiple, 4+)

-Try Enable / Disable guest networks. 

-Turn on/off 20/40 MHz Coexistence. 

-Change Channel to a static, less populated one. 

-Change mode from 1000 Mbps to 433 Mbps, to 54 Mbps.

-Turn off NAT mode (just disables wireless connections), don't know why this was a troubleshooting step.

-Disconnect Chrome Cast devices from Network. 

-Call ISP and ask them to reset the modem. 

-Update Firmware Version  (currently at V3.01.38)- CAN'T do this step because my ISP (Xfinity) is the one that updates this for me. 

 

So again, if anyone knows a fix for this please let me know. Thank you for your time.

 

-Sebas

 

 

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