Anet A8 freeze or crash after auto leveling is finish

HiI Have Anet A8 (skynet 1.1 firmware)Everything works well for a while, I even printed a few things.But now the printer gets stuck or just goes crazy after auto leveling is finish.When I turn on the printer everything is fine including the led screen.But when I do the auto leveling, at the end of the auto leveling, the printer is freeze .Sometimes there is a display on screen and sometimes the Z motor or the X motor keep moving without stopping but in all cases the printer no longer responds.I took a video of the problem.Video link:https://www.youtube.com/watch?v=ikEnGk-17qUmany thanksRoei