Linksys E900 bricked after flashing v24-43290

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ohnoo
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Joined: 31 May 2020
Posts: 11

PostPosted: Tue Jun 02, 2020 0:35    Post subject: Linksys E900 bricked after flashing v24-43290 Reply with quote
Hi, I followed instructions from here https://wiki.dd-wrt.com/wiki/index.php/Linksys_E900#Build_Information
And flashed with the Linksys factory web GUI the newer version I found: dd-wrt.v24-43290_NEWD-2_K2.6_mini-e900.bin

It didn't work. No GUI after restart. Only two 100 ping response when I power cycle. All lights blink once and then remain off, as a normal boot. All Ethernet ports looks good, blinking as traffic when connected.
I've read the recovery part from here https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=51486 SECTION 6
I've tried flashing OEM Linksys .bin and the 21676_NEWD-2_K2.6_mini-e900.bin recommended in the wiki.
Flashing is always successful and then remains pinging well with a TTL of 100. But when I complete the following steps It fails. No GUI and no ping response apart from the first two 100 TTL.
It looks like it's not totally bricked, but there's something in the flashing procedure that's not completing well.
Flashing steps tried include the WIKI, the TFTP https://wiki.dd-wrt.com/wiki/index.php/TFTP_Flash.
I've seen differences in the steps following the flash, in the order of hard resets and power cycles for example, so even I've read a lot I'm not sure which procedure is the right one for my situation.
I'll appreciate If anyone can help.

Thank you.
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kernel-panic69
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Joined: 08 May 2018
Posts: 6990
Location: Texas, USA

PostPosted: Tue Jun 02, 2020 1:21    Post subject: Reply with quote
Trailed mini build is only for initial flash. Not sure if newer K2.6 trailed mini builds are messed up or not. Upgrading is a process that must be done in steps in the correct order using the generic nv64k builds, otherwise. Also, you will want to ensure your LAN ports are working after flashing per the wiki.

If you are using any Chromium-based router, then you will run into issues. This is a well-known problem. Some people recommend that if you do use Chromium-based browsers, to use incognito mode with NO extensions loaded and your antivirus and firewall off... without the router connected to anything but your PC via wired LAN port.

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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.

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ohnoo
DD-WRT Novice


Joined: 31 May 2020
Posts: 11

PostPosted: Tue Jun 02, 2020 18:25    Post subject: Reply with quote
Yes I've used a Chromium based browser for the initial flash.
I've tried many combinations of procedures for TFTP flashing, including OEM and DDWRT E900 mini firmwares, Windows CLI TFTP and Linsys TFTP. Also tried combinations of after successful flashing steps (hard reset, power cycle, etc) according to wikis posted here and also the ones in the official Linksys web site.
I'm stuck in the point where I only get twon 100 TTL pings after a power cycle.

Is there anything else to do before going for wired unbricking techniques?
Thank you
turbowells
DD-WRT User


Joined: 14 Sep 2019
Posts: 157
Location: Maine, USA

PostPosted: Tue Jun 02, 2020 19:04    Post subject: Reply with quote
ohnoo wrote:
Yes I've used a Chromium based browser for the initial flash.
I've tried many combinations of procedures for TFTP flashing, including OEM and DDWRT E900 mini firmwares, Windows CLI TFTP and Linsys TFTP. Also tried combinations of after successful flashing steps (hard reset, power cycle, etc) according to wikis posted here and also the ones in the official Linksys web site.
I'm stuck in the point where I only get twon 100 TTL pings after a power cycle.

Is there anything else to do before going for wired unbricking techniques?
Thank you


To be clear, you're manually starting the tftp transfer at the same time the two pings are reported. The tftp transfer appears to complete. During the tftp transfer, the pings should continue past the initial two pings. Is this all correct?

If so, you're probably having the same issue as this thread (different router model) and you'll have to initiate the tftp from the command line via a serial connection.

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=895421#895421
ohnoo
DD-WRT Novice


Joined: 31 May 2020
Posts: 11

PostPosted: Tue Jun 02, 2020 21:24    Post subject: Reply with quote
turbowells wrote:
ohnoo wrote:
Yes I've used a Chromium based browser for the initial flash.
I've tried many combinations of procedures for TFTP flashing, including OEM and DDWRT E900 mini firmwares, Windows CLI TFTP and Linsys TFTP. Also tried combinations of after successful flashing steps (hard reset, power cycle, etc) according to wikis posted here and also the ones in the official Linksys web site.
I'm stuck in the point where I only get twon 100 TTL pings after a power cycle.

Is there anything else to do before going for wired unbricking techniques?
Thank you


To be clear, you're manually starting the tftp transfer at the same time the two pings are reported. The tftp transfer appears to complete. During the tftp transfer, the pings should continue past the initial two pings. Is this all correct?

If so, you're probably having the same issue as this thread (different router model) and you'll have to initiate the tftp from the command line via a serial connection.

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=895421#895421



You understood perfectly. I've checked the post. Symptoms are the same. I'll search for serial recovery information for my E900, buy a cable and try to follow directions.
Still open to other options.
Thank you.
ohnoo
DD-WRT Novice


Joined: 31 May 2020
Posts: 11

PostPosted: Mon Jul 20, 2020 19:06    Post subject: Reply with quote
Hi everybody, I've got the serial USB adapter, but I can't get to issue the commands like erase, etc.

When I get to break CFE booting, I get on Putty:

Boot version: v5.3.7
The boot is CFE
mac_init(): Find mac [c8:b3:73:13:8f:8f] in location 0
Nothing...

### CLKDIV= 0x8080842, SFlashClkDiv=8 clkdivsf=2 ###

### Change it to 0x2080842 (2) ###
CMD: [ifconfig eth0 -addr=192.168.1.1 -mask=255.255.255.0]
Device eth0: hwaddr C8-B3-73-13-8F-8F, ipaddr 192.168.1.1, mask 255.255.255.0
gateway not set, nameserver not set
Automatic startup canceled via Ctrl-C / ESC
CFE> ▒n▒w▒|▒m▒▒▒▒{|߿▒e

That's the garbage when I type.


So I tried with tftp, putting the factory .bin firmware. This time, while TFTP shows successful transfer, Serial window shows booting process and then I get CFE prompt, but again when I try to type commands, same garbage is shown.
I'm using Windows 10 64b, Putty for 64b, No antivirus, TFTP2 application. CP2101 USB to TTL adapter, Windows P&P driver.
I've tried tweaking the windows serial port buffering with no luck.

Thanks for your help.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 5932
Location: Netherlands

PostPosted: Mon Jul 20, 2020 19:14    Post subject: Reply with quote
There is a sticky about this garbled output in one of the forums.

Will try to find it.

_________________
Routers:Netgear R7800, Netgear R6400v1, Netgear R6400v2, Linksys EA6900 (XvortexCFE), Linksys E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 6990
Location: Texas, USA

PostPosted: Mon Jul 20, 2020 20:30    Post subject: Reply with quote
Window->Translation->Enable VT100 line drawing even in UTF-8 mode (check the box).

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=323931

_________________
Official Forum Rules, Guidelines, and 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.

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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 5932
Location: Netherlands

PostPosted: Tue Jul 21, 2020 5:32    Post subject: Reply with quote
Thanks that's the one Smile
_________________
Routers:Netgear R7800, Netgear R6400v1, Netgear R6400v2, Linksys EA6900 (XvortexCFE), Linksys E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
ohnoo
DD-WRT Novice


Joined: 31 May 2020
Posts: 11

PostPosted: Tue Jul 21, 2020 19:28    Post subject: Reply with quote
kernel-panic69 wrote:
Window->Translation->Enable VT100 line drawing even in UTF-8 mode (check the box).

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=323931


Thank you very much, but it doesn't work. Same result.
The USB adaptor has a red led light, almost always on. I've seen that one turn off and another blue one blink occasionally. But the red one is the most persistent. Don't know what they are telling.
I've read the post suggested, tried with Kermit, but had problems settin baud to 115000, it reverts to 49464.
I've tried three USB ports.
Any ideas?

Tried to share this in that other post that's more specific but it's locked.
Thanks!
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 6990
Location: Texas, USA

PostPosted: Tue Jul 21, 2020 20:12    Post subject: Reply with quote
Then you have a bad connection to the router mainboard. Probably the ground.
_________________
Official Forum Rules, Guidelines, and 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.

---------------------------------------------------------

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turbowells
DD-WRT User


Joined: 14 Sep 2019
Posts: 157
Location: Maine, USA

PostPosted: Tue Jul 21, 2020 21:47    Post subject: Reply with quote
You're only connecting rx, tx, and ground, correct? Do not connect 3.3v. The 3.3v pin is closest to the edge of the board.

() 3.3V
() TX
() RX
() ?
() ground


Pinout found here...

https://domonkos.tomcsanyi.net/?p=398
ohnoo
DD-WRT Novice


Joined: 31 May 2020
Posts: 11

PostPosted: Wed Jul 22, 2020 20:07    Post subject: Reply with quote
kernel-panic69 wrote:
Then you have a bad connection to the router mainboard. Probably the ground.


You where precisely right!!
My gnd solder was loose, so I've reinforce all connectors.
I've broke CFe at first attempt, then followed Serial recovery instructions, 1-erased nvram, 2-issued proper flash command, 3- put latest factory firmware with CLI TFTP, 4- go command, and the following instructions.

Logged in to factory web gui, flashed with Firefox dd-wrt.v24-42557_NEWD-2_K2.6_mini-e900 following E900 wiki. And voila, I'm finally on board of the DDWRT ship. Now I'll upgrade following your reccomendations here https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=152924&postdays=0&postorder=asc&start=225&sid=8390cd7488b2d5625b9a612afb102e22

About lights? well, according to what happened when worked well the red one means power on, and the blue one means serial traffic. I've only used TX,RX (crossed cabled with router board) and GND, properly soldered Wink

I really want to thank all the support offered. I'll start to study all this further and see If I can give it back eventually.
Edit: Successfully flashed DD-WRT v3.0-r42557 mega
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