I got the same issue, bought TP-LINK archer C4000 router few days ago, at first i was able to connect to the 2.4Ghz and set up everything. After a day, out of sudden 2.4ghz went missing, could find the SSID at all, following 5Ghz disappear too. After hard reset, only 5Ghz SSID can be seen. 2.4Ghz totally gone.

Danize wrote

I lost my 2.4ghz connection while the 5ghz still working, the strange thing is my 2.4ghz extension still working. Anyone can help? Thanks.

Kevin_Z wrote

Hi,

 

What is the 2.4GHz light? Does it come on when the 2.4GHz network gone? 

 

If all the devices cannot see it? What is the status of 2.4GHz once you logged into the web interface? 

Note: How to login: https://www.tp-link.com/en/support/faq/1524/

 

May I know how did you hard reset it? Holding the reset button / hole for 10s? 

 

Besides, what is the current hardware and firmware version?

 

Thanks in advance. Good day. 

Dot wrote

I got the same issue, bought TP-LINK archer C4000 router few days ago, at first i was able to connect to the 2.4Ghz and set up everything. After a day, out of sudden 2.4ghz went missing, could find the SSID at all, following 5Ghz disappear too. After hard reset, only 5Ghz SSID can be seen. 2.4Ghz totally gone.

 

2.4Ghz light is blue color on the device itself

When i logged into the web interface i saw that 2.4GHz has a orange color wifi signal in your web interface

current hardware is v2, firmware version is v1.21

When i start using the router i can see 2.4Ghz, but after a day, 2.4Ghz suddenly stop broadcasting.

This is my firmware Archer C4000(US)_V2_180322.

still no 2.4Ghz, 5Ghz is fine, so weird

Kevin_Z wrote

Hi,

 

Thanks for your reply. 

 

Can you see the 2.4GHz network name on your device at that time? If you can see it but unable to connect to it, is there any error message? 

 

What is the current firmware? Is it 180322? 

 

Have you tried to change some wireless settings of 2.4GHz? Like channel and channel width. 

Note: You can fix channel as channel 1, 6 or 11, and change channel width to 20MHz. 

 

Besides, have you ever hard reset the device by holding the reset button/hole for 10s? If not, please give it a go.

 

Any updates, just let me know. 

 

Good day. 

 

 

Please release new firmware to fix the 2.4Ghz issue

Kevin_Z wrote

Hi,

 

May I know if all the devices cannot see the 2.4Ghz ssid at that time? What about your laptop? Try to move them closer to the main router and check whether you can detect the 2.4GHz. 

 

Meanwhile, what is the brand and OS version of your cellphone and laptop?

 

Thanks in advance, and have a nice day. 

All my devices cannot see 2.4Ghz ssid, it's definetly not my laptop or cellphone problem, as i tried mac os, iphone, android, all cannot. furthermore i switch back to old d-link router i am able to see 2.4Ghz. your 5Ghz is really fast, but please update your firmware to fix the 2.4Ghz, else i think i have to switch brand