Default [Q] Andrive car unit. Help needed!

Hello. I bought Andrive AN39 android car unit. I tried to update android side of this thing (with right firmware) but it failed and now my android side's screen is full of flicker and i can't see anything on the screen. How i can get to recovery screen or get the original firmware back? I don't know any key combination to recovery mode. Unit has reset button but it does only reset the windows side and that works well. Android side is booting (and i think it starts too) because i see piece of android logo behind flickering. Please help me!