wikkibk46 wrote

How to revert back yp link 5210 original firmware from nanostation m2 firmware?

You are the second person I had ever read about it in Wi-Fi forums
For sure you are doing something wrong
The tuto is clear, there is no way going back
If you want you can google about serial cable, means soldering to 52 board, and if you don't know what you are doing you will end up with a brick
Post your issue