Lapbook Air CWI529 don't enter BIOS

Hi friends

I’m having some troubles with my Lapbook Air CWI529 and I hope you guys helpme to fix it.

when I plug in and turn ON my chuwi got stok on logo and just get there doing nothing more.

I allreadied try by pressing ESC, F2, F7, F9, ESC+DEL
also using funtion FN+(same keys)
I plugged an external keyboard too

and just do nothing… I press and hold power button tu turn on and off repeating all process and I can’t solve

I hope you guys light me on my issue