Yi Home 1080p ai+ (y21ga) no sd reading and wifi psw error

[a78p]

Hi to all the team, in someway i blocked, i don't know if bricked, my camera, it can't read sd card so no yi hack and wrong psw message in stock firmware. Some suggestion please? How to proceed?

[roleoroleo]

If the problem is the sd card, replace it with a new one.
If the cam doesn't start, use the unbrick procedure.

[a78p]

I tried a new sd, but not succes, tried hack in the sd with the wifi credentials already set, but the camera try everytime to install stock firmware , and says psw Error. Tried also different wifi. About the unbrick procedure, I can have a backup from another same camera I've, could be ok? I would try software way at first, because the soldering procedure has dx, rx and grd places too small for my soldering iron. Anyway the procedure are not very clear for me, is somewhere a video to show how to do?