Unbrick TP-Link WR840N v6.20
Tftp server in here i use pumpkin klever. Download
DD tools Download, tplink firmware Download.
if you cannot recovery via tftp recovery using original fw tplink you need this step,
step. cut the boot firmware use dd:
From cmd:
dd if=original.bin of=tp_recovery.bin bs=512 skip=1
then push via tftp, set computer ip to 192.168.0.66, rename the firmware to tp_recovery.bin
press reset button until it flashes, and upload automatic fm from tftp server. wait for finished and boot up.
voila.