[solved]RT-AC66U - 5GHz missing after wrong flashing

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Darklanmaster
DD-WRT Novice


Joined: 20 Oct 2006
Posts: 8

PostPosted: Mon May 04, 2015 20:50    Post subject: [solved]RT-AC66U - 5GHz missing after wrong flashing Reply with quote
Hi,
I made a huge mistake. I flashed the wrong dd wrt version to my Asus RT-AC66U. Instead of flashing the the firmware for RT-AC66U I flashed RT-N66U.
I could recover my router using the asus recover mode and flash the right dd wrt version but now the 5GHz is gone. Instead of the the 5Ghz interface dd wrt show "Wireless Physical Interface wl1 [2.4 GHz TurboQAM]" with the same MAC address as the first interface?! Shocked

What I tried:
1. reflash dd wrt RT-AC66U (dd-wrt-26653-Asus_RT-AC66U.trx) + erase NVRAM = still no 5GHz

2. reflash original asus firmware = 5 Ghz available during wizard but the webui seems to be broken. I can select only 2.4Ghz. If I select something with 5Ghz I get only a white/broken page.

3. reflash dd wrt RT-AC66U (dd-wrt-26653-Asus_RT-AC66U.trx) + erase NVRAM = still no 5GHz

Can someone help me to fix this?

Some pictures:
http://derdark.de/ddwrt/ddwrt_status_tab.jpg
http://derdark.de/ddwrt/ddwrt_wireless_tab.jpg

Some log files:
http://derdark.de/ddwrt/ASUS_system_log.txt
http://derdark.de/ddwrt/ASUS_wireless_log.txt
http://derdark.de/ddwrt/ddwrt_log.txt


Last edited by Darklanmaster on Mon May 04, 2015 21:55; edited 1 time in total
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Darklanmaster
DD-WRT Novice


Joined: 20 Oct 2006
Posts: 8

PostPosted: Mon May 04, 2015 21:19    Post subject: Reply with quote
Maybe some is wondering why I installed the flash for a RT-N66U? Because google sucks! Sad
I searched for "dd wrt RT-AC66u" to get an installation guide. But the first result is the dd wrt wiki page for RT-N66U! Damn! Mad
jrscs
DD-WRT User


Joined: 09 Aug 2010
Posts: 230

PostPosted: Mon May 04, 2015 21:22    Post subject: Reply with quote
RT-AC66u

*** Builds after 26339 when erasing NVRAM in telnet session or Power UP Reset, resets 5.0 GHz radio to 2.4 GHz radios – To recover return to 26339 ***
*** Builds after 26339 use the GUI to reset NVRAM to Factory Defaults ***

_________________
Asus AC87U A1 - DD-WRT v3.0-r39538 std (04/16/19)
Repeater Bridges(s)
Asus AC68R A1 - DD-WRT v3.0-r39538 std (04/16/19)
Netgear R6400 V2 - DD-WRT v3.0-r39538 std (04/16/19)
Asus AC66U A1 - DD-WRT v3.0-r38132 giga (12/28/18 )
Darklanmaster
DD-WRT Novice


Joined: 20 Oct 2006
Posts: 8

PostPosted: Mon May 04, 2015 21:57    Post subject: Reply with quote
THANK YOU!!!! Surprised
That solved my problem.

Where do you find this? I search in the forum but I don't find anything related
jrscs
DD-WRT User


Joined: 09 Aug 2010
Posts: 230

PostPosted: Mon May 04, 2015 23:18    Post subject: Reply with quote
A good place to start is read the build thread that you flashed. If you don't find anything that matches your issue look in the prior build thread. Do this for several builds back.

Most build threads show what works and what does not work, to some degree.

Glad you got your issue resolved.

_________________
Asus AC87U A1 - DD-WRT v3.0-r39538 std (04/16/19)
Repeater Bridges(s)
Asus AC68R A1 - DD-WRT v3.0-r39538 std (04/16/19)
Netgear R6400 V2 - DD-WRT v3.0-r39538 std (04/16/19)
Asus AC66U A1 - DD-WRT v3.0-r38132 giga (12/28/18 )
realdreams
DD-WRT Novice


Joined: 23 Feb 2010
Posts: 45

PostPosted: Wed Jun 24, 2015 8:57    Post subject: Reply with quote
So i installed latest ddwrt build from asus factory default, cleared nvram in both asus and ddwrt with telnet. Then I realized i have no 5ghz, only a 2
4Ghz turboqam. So i shiuld do a gui factory reset to get 5ghz back?
jrscs
DD-WRT User


Joined: 09 Aug 2010
Posts: 230

PostPosted: Wed Jun 24, 2015 11:21    Post subject: Reply with quote
You will need to back grade your dd-wrt to 26339 before using the GUI Factory Reset. Then you can move forward with later builds using only the GUI Factory Reset, not telnet when erasing nvram.
_________________
Asus AC87U A1 - DD-WRT v3.0-r39538 std (04/16/19)
Repeater Bridges(s)
Asus AC68R A1 - DD-WRT v3.0-r39538 std (04/16/19)
Netgear R6400 V2 - DD-WRT v3.0-r39538 std (04/16/19)
Asus AC66U A1 - DD-WRT v3.0-r38132 giga (12/28/18 )
realdreams
DD-WRT Novice


Joined: 23 Feb 2010
Posts: 45

PostPosted: Thu Jun 25, 2015 23:15    Post subject: Reply with quote
Thanks flashing to 26339 with factory reset brought back 5GHz. I am not sure if the factory reset during firmware upgrade was necessary.

What's the latest working build for RT-AC66U? It appears the last few builds got quite a few issues.
flyznoz
DD-WRT Novice


Joined: 18 Aug 2014
Posts: 7

PostPosted: Mon Nov 30, 2015 19:13    Post subject: Reply with quote
Where can i find the specific page for reading about releases for this model ?
Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 5076
Location: Akershus, Norway

PostPosted: Tue Dec 01, 2015 22:03    Post subject: Reply with quote
There are no specific Page. You have to read the Build Threads.
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