WNDR3700v3 Bricked, looking for help.

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Ihatechartercable
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Joined: 08 Apr 2017
Posts: 5
PostPosted: Fri May 04, 2018 22:28    Post subject: WNDR3700v3 Bricked, looking for help. Reply with quote
Hey lads, I tried to upgrade my WNDR3700v3 to a newer dev build a late april build, but upon doing that the router rebooted and the blue 5ghz/2.4ghz power led is on, the power light is on and it can detect wan cables being connected, but:

1. The unsecured dd-wrt connection does not appear, I can't reach 192.168.1.1 through ethernet either.

2. 30/30/30 does nothing.

I would really appreciate some help, thank you.
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jwh7
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Joined: 25 Oct 2013
Posts: 2670
Location: Indy
PostPosted: Fri May 04, 2018 23:58    Post subject: Re: WNDR3700v3 Bricked, looking for help. Reply with quote
Ihatechartercable wrote:
Hey lads, I tried to upgrade my WNDR3700v3 to a newer dev build a late april build, but upon doing that the router rebooted and the blue 5ghz/2.4ghz power led is on, the power light is on and it can detect wan cables being connected, but:
Ya don't use builds after 35531. Smile After it's booted for a while, and you press & hold reset button for 20+ sec, nothing happens? Or it just doesn't help? Sounds like you need to try TFTP:
https://www.dd-wrt.com/wiki/index.php/TFTP_flash
https://www.dd-wrt.com/wiki/index.php/Recover_from_a_Bad_Flash#Recovering_with_TFTP
You could try 35531 trailed build, but the OEM f/w might be required to recover.
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OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
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Malachi
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Joined: 17 Jul 2012
Posts: 7209
Location: Columbus, Ohio
PostPosted: Sat May 05, 2018 1:53    Post subject: Reply with quote
Google dd-wrt serial recovery. Tftp recovery won't work on this unit.
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Ihatechartercable
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Joined: 08 Apr 2017
Posts: 5
PostPosted: Sat May 05, 2018 2:45    Post subject: Reply with quote
Thanks for the info fellas, I will keep digging around and serial recovery if I have to, but it looks super complicated and frankly the cost of the router doesn't justify an extra 10 bucks on a cable, are there any cheap dual band router recommendations that have decent recovery options (like tftp) besides serial that you guys recommend?
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Malachi
DD-WRT Guru


Joined: 17 Jul 2012
Posts: 7209
Location: Columbus, Ohio
PostPosted: Sat May 05, 2018 11:00    Post subject: Reply with quote
Ihatechartercable wrote:
Thanks for the info fellas, I will keep digging around and serial recovery if I have to, but it looks super complicated and frankly the cost of the router doesn't justify an extra 10 bucks on a cable, are there any cheap dual band router recommendations that have decent recovery options (like tftp) besides serial that you guys recommend?


Asus rt-n66u.
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