For fix this is only one way (╯︵╰,).
Connect to UART port on mainboard. Remember to connect GND too.
If you're using arduino as adapter then short RESET to GND for bypass uC and connect RX -> UART RX, TX -> UART TX. If USB UART adapter then connect RX -> UART TX, TX -> UART RX.
Chinese arduino with CH340T and etc. (not atmega8 programmer) probably won't work as adapter.
Connect to adapter using putty with baud rate 115200. I'm using linux and for me device is listed as /dev/ttyACM0.
If no error then adapter connected succesfully. Plug power cable and you will see booting messages.
Type "netcar sn yourserialnumber" and press enter.
Problem solved <(￣︶￣)>.
Poland strong ᕙ(⇀‸↼‶)ᕗ.
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