I updated the firmware once in the TP-LINK TL-WR741ND V2 router with OpenWrt | Kamikaze (r25068).
Standard root login without a password. The user has set some kind of password, so I had to hold the reset for 15 seconds while the router was turned on in order to reset the settings.
First, download the special firmware – wr741ndv1_ru_3_11_7_up (100925) -factory
And then the last official:
https://www.tp-link.com/en/support/download/tl-wr741nd/v2/#Firmware
Connect to the router through any of the LAN ports, go to the settings by typing http://192.168.1.1 (or http://192.168.0.1) in the browser and enter the login and password – admin.
After the settings are opened, click “System” – “Flash Firmware”, select “Browse” and point to the special firmware file unpacked from the archive, uncheck the “Keep configuration” checkbox, click “Upload” and “Proceed” to start the update process.
Upon completion of the process, we open the web interface of the router at the same address http://192.168.1.1, with the login and password “admin”. At the bottom, select “System Tools” – “Firmware Update”, click “Browse” and specify the newest firmware downloaded from the official site, click “Improve” and wait for the process to complete.
Old firmware settings will be reset to factory defaults.
Done!