Sega-Naomi

hi i just got my virtua striker 4 2006 naomi universal cab and i have no idea how to set the coin system to free play, also i want to turn the volume up but cannot open the control panel even though i used the key. Can anyone help this is my first arcade machine



cheers !

ok i just worked it out, you have to press down really hard as you are turning the key and all the buttons are there !!!!