First you have to understand why its dont loading. After flash dump, firmware will no contain serial number, mac address. You need to buy UART\TTL adapter and wired adapter to connect to the board by picoblade pin to UART adapter. This need to get logs of booting and its same using to set serial number and mac address. Confirm that you understand what is UART and tell is you have it. Also pls, make a photo of your board.
this way is harder than unsolder chip, flash dump then connect by UART and type 3 commands.and can i edit sn and mac by editing hex file?
+3.3, GND, TX (RX), RX(TX). First you have to find GOD. when you found it at 2nd place, be sure that first pin have to be +3.3, then another twos can found by probing and trying.,can you provide me some infos about rx,tx pins
if you mean software, use putty (kitty) or any what you like for ex. teraterm, NCOM etcwhat terminal should i use to get this log