according to
Please have a look @ point after 4.
1)download TinyPXE.zip and unpack it.
https://anonfile.com/lep8Caybo9/TinyPXE_zip
2)connect ethernet cable to the router, set static ip to your local network(192.168.1.x)
3)turn off your router and hold down the reset button then power on your router when power LED start flashing slowly release it .
4)run pxesrv.exe (it is fully configured), click "Online" ( i have used international version 3.0.24 to flash, file renamed as test.bin)
after clicking online, within a minute, in router yellow light will stop blinking and will be constant on position,
wait 7-10 minutes when power led turns blue or keeps on blinking blue, power off your router then power on it.
note: if yellow or purple light keeps on blinking, this means wrong firmware is selected.