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Topic: TL-WR741ND (v4.20) rebooting over and over

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Hi!

I have problem with my TL-WR741ND v4.20. Router rebooting over and over. How can I fix this?

Serial output:

U-Boot 1.1.4 (Sep 14 2011 - 16:30:24)

AP121-2MB (ar9330) U-boot

DRAM:  32 MB
led turning on for 1s...
id read 0x100000ff
flash size 4194304, sector count = 64
Flash:  4 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
: cfg1 0x5 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
ag7240_phy_setup 
eth0 up
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
athrs26_reg_init_lan
ATHRS26: resetting s26
ATHRS26: s26 reset done
ag7240_phy_setup 
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...
   Uncompressing Kernel Image ... Too big uncompressed streamLZMA ERROR 1 - must RESET 

U-Boot 1.1.4 (Sep 14 2011 - 16:30:24)

AP121-2MB (ar9330) U-boot

DRAM:  32 MB
led turning on for 1s...
id read 0x100000ff
flash size 4194304, sector count = 64
Flash:  4 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
: cfg1 0x5 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
ag7240_phy_setup 
eth0 up
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
athrs26_reg_init_lan
ATHRS26: resetting s26
ATHRS26: s26 reset done
ag7240_phy_setup 
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...
   Uncompressing Kernel Image ... Too big uncompressed streamLZMA ERROR 1 - must RESET 

U-Boot 1.1.4 (Sep 14 2011 - 16:30:24)

AP121-2MB (ar9330) U-boot

DRAM:  32 MB
led turning on for 1s...

(Last edited by francx on 24 Jun 2012, 16:58)

francx wrote:

Serial output:
...
Autobooting in 1 seconds
## Booting image at 9f020000 ...
   Uncompressing Kernel Image ... Too big uncompressed streamLZMA ERROR 1 - must RESET
...
TL-WR741ND (v4) rebooting over and over

It doesnt even start the kernel, flashed a wrong image?

You already have a serial connection which is the biggest hurdle for many, so just use it to flash a new image via tftp (its described on the wiki page of your router).

I can not setup ipaddr and serverip because my router are rebooting over and over

Autobooting in 1 seconds

Write

tpl

to stop autoboot and get uboot prompt.

Thank you very much!

This happened to me few times!
I think it was because the openwrt OS was stuck or in a strange status, after doing sysupgrade it didn't reboot and stayed without network connectivity forever. After 15 minutes I said, hey! go on! and disconnected the router. Then it happened that, corrupted firmware. So I had to recover using the bootloader
Now I always save my config files first, then do "mtd -r erase rootfs_data" to delete everything, returning to factory settings.
After it reboots, I do the upgrade. No problems since then.

hello
I have the same problem, can describe the procedure step by step, please, I'm new in these things.

thank you very much
greetings

I got, my router works fine, Here is my tuturial


TUTURIAL TFTPBOOT + RS232 PARA TP-LINK 741ND V2

1-MATERIAL NECESSÁRIO

CABO NOKIA CA-42 OU DKU-5 EU USEI O SEGUNDO COMPREI NOS CHINESES 5€

2-SOLDAR A PLACA NOS PONTOS REFERIDOS NA IMAGEM ABAIXO(EU SOLDEI NA PARTE DE TRÁS).

http://wiki.openwrt.org/_detail/toh/tp- … tl-wr741nd

VERIFICAR O PINOUT DO CABO CONFORME IMAGEM ABAIXO

http://www.google.pt/imgres?imgurl=http … mp;dur=535

3-EU UTILIZEI O SISTEMA LINUX UBUNTU, INSTALEI O SERVIDOR TFTP-HPA E CONFIGURAR O FICHEIRO TFTP-HPA.

# /etc/default/tftpd-hpa

TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/home/ropafiro/tftpboot"
#TEM QUE CRIAR ESTA PASTA NA VOSSA HOME E COPIAR PARA LÁ O FICHEIRO BIN DO FIRMWARE DO ROUTER
TFTP_ADDRESS="192.168.1.68:69"
#ESTE IP É O DO VOSSO COMPUTADOR
TFTP_OPTIONS="—secure"

4-USEI O CUTECOM PARA CONECTAR AO ROUTER COM O RESPECTIVO CABO DKU-5

PENSO QUE BASTA ALTERAR O DEVICE PARA /dev/ttyUSB0

LIGAR O ROUTER A REDE NA PORTA WAN

5-PARA PARAR O REINICIAR DO ROUTER, ASSIM QUE APARECER A MENSAGEM

Autobooting in 1 seconds INPUT tpl

INPUT setenv serverip 192.168.1.68 ESTE IP É O DO VOSSO COMPUTADOR

PARA TER  A CERTEZA DO ENDEREÇO (0x81000000) MEMORIA ACONSELHO A EXECUTAR O COMANDO loady

INPUT tftpboot 0x81000000 tplink.bin ESTE BIN É O FIRMWARE ORIGINAL DO ROUTER CONVEM ALTERAR O NOME PARA TPLINK
NO FINAL DO FLASH APRESENTA UMA MENSAGEM COMO ESTA:
Bytes transferred = 3932160 (3c0000 hex)

O PRÓXIMO INPUT erase 0x9f020000 +3c0000 REPAREM QUE O SEGUNDO ENDEREÇO E O QUE A MENSAGEM TEM.
DEPOIS DE EXECUTADO O ERASE DÁ UMA MENSAGEM:
Erased 60 sectors

INPUT cp.b 0x81000000 0x9f020000 0x3c0000

E FINALMENTE INICIAMOS O ROUTER INPUT bootm 9f020000

SE TUDO ESTIVER BEM PODE ACEDER AO ROUTER NO BROWSER 192.168.1.1
USER:admin
PASSWORD:admin


AGRADEÇO A TODOS OS TUTORIAIS QUE ENCONTREI NA INTERNET

http://www.google.pt/imgres?imgurl=http … mp;dur=535

http://www.google.pt/imgres?imgurl=http … mp;dur=535

http://www.youtube.com/watch?v=713hvVp_hFw

http://wiki.openwrt.org/toh/tp-link/tl-wr741nd

ftp://dd-wrt.com/others/eko/BrainSlayer … wr741ndv1/

http://www.dd-wrt.com/phpBB2/viewtopic.php?p=671793

http://puffs.wordpress.com/2008/02/14/i … em-ubuntu/

BOA SORTE

(Last edited by ropafiro on 26 May 2013, 17:17)

Hello I have the same problem with my Tp -Link MR 3020
During the screen the "tpl" password doesn't work, i don't know how to fix it ?

Thank You

Auto-Response :

27/07/2015 SOLVED since 2014 : It was a hardware problem, u-boot console working well with tpl, i could flash a new .bin image by tftp protocole, for any question send a message !

(Last edited by sayatnowa on 27 Jul 2015, 15:49)

sayatnowa, please start a new thead. And give all console output
And what you did to get where you are.

Since I have a similar problem I´d rather not open a topic but post it here. Hopefully I get responses quick because I need to set up the device by tomorrow! big_smile

Got a bricked 741ND v2.4

Got rs232 connected. Now Im rather certain I got RX/TX/GND right because I use the same cable to unlock netgear devices.

When I open the session in putty nothing happens when I power on the 741nd. When its off I can type and see my inputs.

When I disconnect the RX wire and only TX and GND are attached I get the following output:

U-Boot 1.1.4 (Sep  3 2010 - 12:28:13)

AP91 (ar7240) U-boot
DRAM:
sri
#### TAP VALUE 1 = a, 2 = a
32 MB
id read 0x100000ff
flash size 4194304, sector count = 64
Flash:  4 MB
Using defaulüIn:    serial
Out:   serial
Err:   serial
Net:   ag7240_enet_initËëfixed address
: cfg1 0xf cfg2 0x7014
eth0: 00:03:7f:09:0b:ad
eth0 up
No valid address in Flash. Using fixed address
: cfç¡Q!IMÉ6: resetting s26
ATHRS26: s26 reset done
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...                     ½ÙÉ5
   Uncompressing Kernel Image ... Error: Bad gzippedà
Resetting...

U-Boot 1.1.4 (Sep  3 2010 - 12:þèÉ¥5
                                   VALUE 1 = a, 2 = a
32 MB
iäѽÉcount = 64
Flash:  4 MB
Using default environment

In:    serial
Out:   serial
Err:   seriNet:   ag7240_enet_initialize...
No valid address in Flash. Using fixed address
: cfg1 0øþeth0 up
No valid address in Flash. Using fixed address
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
ATHRS26: resetting s26
ATHRS26: s26 reset done
þeconds
ÿÊ2Á20000 ...
   Uncompressing Kernel Image ... Error: Bad gzipped data
GUNZIP ERROR - must RESET board to recover

Resetting...

But obviously since RX isnt connected I cant type tpl to interrupt reboot. Baud is 115200 8/1/N/N played around with different settings but same result.

Hopefully someone has an idea. Thanks for any help!

check for shortcuts, you say you can "see your inputs"? you mean u got echo in terminal? that is not ok.

Yes when the 741nd is powered off I can type into the console. When I power it on, nothing happens. Not even output, only when detaching RX then I get what I posted above. It´s weird. Check for shortcuts on the 741?

lol i mean short-circuits.. with a multimeter, check resistance (ohm ) between tx and rx.

Not sure if I did this correctly because Im not that into electronics. But when its turned off I get a read of 1350 and when on its about 850. Dont know what that means?!?!?!? :D

Edit: when I set the MM to 20M then I get a reading of 8.4 when the 741 is off and power unplugged, when off and power plugged in its 6.3 and when its powered on nothing happens.

Edit 2: Well now I unplugged RX and could spam tpl BLINDLY and it actually stops the reboot. LAN lights up. Now I have the problem that since I cant read, I dont now if printenv setenv etc does anything. If yes it wouldnt talk to my tftp server so I dont know if the memory adress I use 0x81000000 is actually correct for the tftpboot 0x............ firmware.bin command is accurate.

Normally I wouldnt care for a 15€ device but I have heavy OCD in those regards and really would love to solve this.

(Last edited by geyza0711 on 4 Mar 2014, 20:16)

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