MR3420 v3.0 40559 build

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DD-WRT Novice

Joined: 02 Sep 2020
Posts: 1

PostPosted: Wed Sep 02, 2020 12:11    Post subject: MR3420 v3.0 40559 build Reply with quote
Hello to everyone !, I recently downloaded this build made the upgrade to my router, now I can't upgrade my router to another build because the "upgrade firmware" page on my router now it doesnt work, it stays in upgrading.... and nothing happens after, so i want to know first where i can find a good build for my router, because in the router database i only know the builds 36527,36410,36330, 36247, so can i use one of this ones to reflash my router ?, and second one what i can do now that i don't have the option to upgrade my router through the firmware upgrade page, i'd like to know, guys if you experienced something like, and also want to know if there is a way to upgrade my router via ethernet port. 'cause i dont have any other way to do so. thank you in advance !

Joined: 18 Mar 2014
Posts: 7443
Location: Netherlands

PostPosted: Wed Sep 02, 2020 12:43    Post subject: Reply with quote
A lot of information can be found in the forum guide lines this is recommended reading.
Link in my signature at the bottom of this post, those will tell among other interesting titbits not to use the router database, 40599 is particularly bad build.

Installing builds via the command line is possible
see the installation wiki but it can differ per router model so research carefully.

You can try another web browser to upgrade, chromium based browser do not play nice with some DDWRT builds

Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:
OpenVPN Documents & Guides:
Install guide R6400v2:
Install guide R7800:
Forum Guide Lines (important read):

Joined: 08 May 2018
Posts: 8369
Location: Texas, USA

PostPosted: Wed Sep 02, 2020 13:01    Post subject: Reply with quote
Is the v3.x even officially supported? Last update was WIP with donated hardware needed:

It probably won't upgrade if there is a checksum error, most likely you will have to flash via command line. Not even sure how you got 40559 to flash correctly in the first place. Or am I mistaking the v3.0 being for DD-WRT v3.0 instead of router model version? Clarity is always a good thing when you post.

Official Forum Rules, Guidelines & Helpful InformationFirmware FAQInstallation WikiWhere Do I Download Firmware?
DON'T use Chromium-based browsersRTFM/STFW TL;DR is NOT an excuse. • Why Should I Care What Color the Bikeshed Is?
Please DO NOT PM me with questions; Ask in the forum. ---------------------- Linux User #377467 /

Joined: 24 Apr 2019
Posts: 65

PostPosted: Wed Sep 02, 2020 16:13    Post subject: Reply with quote
Iam using 3420 v1 and some of previusly beta version have a bug on web gui, you can flash via terminal/putty to up/downgrade the another beta version.
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