Engenius_ens202ext brick after flash openwrt

hi guys. sory my bad english. I am flash http://downloads.openwrt.org/releases/19.07.3/targets/ar71xx/tiny/openwrt-19.07.3-ar71xx-tiny-ens202ext-squashfs-factory.bin this frimware to ens 202ext, result my device not connect web interface or terminal ssh. automatic İp adress start with 169......
I tried ttl serial connect but putty on the terminal screen nothing comes
Please help me any tutorial video or text

Serial at J1

3V (white arrow)

connect only GND, RX, and TX

connect to serial first, then power board
interrupt boot by pressing enter until console is available

run failsafe_boot

wait a minute...
access firmware upload page at
upload a factory.bin