Hi! I tried to install openwrt into my TL-WR840N(KR) v5. I tried to install with GUI installation but it failed with error(I don't remember the error number). So I tried to install openwrt using TFTP but after uploading openwrt firmware power lamp is just keep blinking(green light). I was thinking that my router is went brick so I tried to recover with original firmware from tp-link homepage with TFTP but power lamp is keep blinking. Is there any way to recover my router? I called tp-link support center but person from support center are just keep saying there's other way without GUI installation(where is TFTP??). It will be awesome if I can install openwrt to my router.

TFTP recovery what I have tried: https://www.youtube.com/watch?v=ZW5fpOWpI0I

Openwrt firmware that I tried to install: http://downloads.openwrt.org/releases/18.06.4/targets/ramips/mt76x8/openwrt-18.06.4-ramips-mt76x8-tl-wr840n-v5-squashfs-sysupgrade.bin

Firmware that I tried to recover(from tp-link homepage): https://static.tp-link.com/2018/201809/20180926/TL-WR840N(KR)_V6.20_180904.zip