Posted: Sun Jun 16, 2019 18:02 Post subject: Bricked WR841Nv8 ?
Symptoms:
- The power LED is on solid, and all of the other LEDs flash on every 5 seconds.
- Pinging fails with destination host unreachable. (ethernet, only one devices connected, tried pinging IP 192.168.0.1, 192.168.1.1, 192.168.2.1 with computer on same subnet)
- I tried 30/30/30 reset. While holding the reset button, the right-most LED with the lock icon also comes on. After the reset, the same power-LED-on, other-LEDs-flashing behavior continues and pings still fail.
Is it dead?
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How it happened:
I tried updating the firmware from r36808 to r39944 using the web gui. After a while at the usual "updating" splash screen, it just returned to the webgui without updating. After trying the update maybe 3 times, I decided to reboot the device, at which point it went into this state.
I solved this by using a different computer for the TFTP server. For some reason, "netstat -ap | grep 69" showed only an entry for udp6 on the computer that didn't work, while the other had entries for both udp and upd6.
Also, very confusingly, the recovered router retained all my settings, passwords, ssid, ssh key, even after all the 30/30/30 resets! Does the 30/30/30 not apply to this router? https://wiki.dd-wrt.com/wiki/index.php/Hard_reset_or_30/30/30 I didn't think it's "new", and don't think it's ARM (MIPS). Though I'll have to keep this distinction in mind for my ARM router (R7000).
Posted: Mon Jun 17, 2019 12:45 Post subject: TFTP Recovery
I have had that happen on several of my routers when I recover them. Some do, some don't.
Serial, not Serial / TFTP, will overwrite the linux partition on the flash chip, no settings will be saved at all. _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.
Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS
Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
Posted: Tue Jun 18, 2019 3:12 Post subject: 30-30-30
I believe I have done a 30-30-30 hard reset on my 841ND v8. I am not sure though. I know it doesn't work on the DIR-615 C1,E3. That is the same way to get them into Firmware Recovery Mode on the D-Links.
Netgear uses a TFTP server on the router, so your computer needs to PUT a file using a TFTP client. The opposite of TP-Link. _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.
Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS
Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
I thought the 30/30/30 reset had worked on the WR841N v8, but it was a long time ago, so I'm not sure either.
Oh good, if the R7000 has the TFTP server on the router, it should be even easier to recover. I hope I'll never need it! But now I can update firmware with less worry.