Firmware update on my ASUS RT-AX82U knocked out 5ghz band & turtled 2.4

[Dataman64]

BACKSTORY (summarized):

The first few times I attempted to update the firmware on my ASUS RT-AX82U, the update failed and it either rebooted itself 15 seconds after wi-fi connected, had unstable connectivity or “bricked” it for a few days.

I had tried the Reset button & Factory reset via WPS switch. Only made things worse after re-entering the SSID data over and over. Yes, I called ASUS support, but no solution worked. At this stage, ethernet & wi-fi were dead.

After doing my own research, as a last resort, I forced a firmware update by connecting PC to wi-fi hotspot from cell & then manually downloading the firmware file from the ASUS download center. I then used the ASUS FIRMWARE RESTORATION tool. My router was manufactured in 2021, so I eventually used the 11/21 version, since other versions were extremely unstable.

After that, my ethernet and Wi-Fi worked, albeit without the 5ghz band and Wi-Fi being slow. Reluctantly, after a few days I used the GUI to update the firmware to the latest version:

Current Version : 3.0.0.4.388_24963-g7d00a47
The latest version : The router’s current firmware is the latest version.

Ethernet works fine @ 289mbs. Wi-Fi partially works, but enough to stream videos and support smart-home devices.



CURRENT DILEMMA:

• As of this writing, my 5Ghz SSID is not showing on my cell and the 5Ghz LED on the router is not lit, even though the dual-band broadcast is enabled. I can live without it but just wondering why?
• The download speed of the 2.4Ghz band is low, between 4-12Mbs.

Attached is a screenshot of my router’s main GUI. Further screenshots or feedback of menu items A-U available upon request.

 

[matrixone01]

I have the same issue, downloaded latest firmware 3.0.0.4.388_25004, this broke the wifi 5g and broke the 2.4ghz as yours, since I started to have the weird WAN lan spikes after the upgrade.

Had to downgrade to 3.0.0.4.388_24232, no luck. If you go to the wireless settings is asking for an area code, so looks like our wifi is broken or lost the partition. No hard reset by web, button combinations works. I did send a help of feedback on the administration - feedback panel.

 

[Tech9]

If you go to the wireless settings is asking for an area code

Most likely another hit by malware router:

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www.snbforums.com

If you have warranty left - get RMA and send the router back to Asus.