Trying to access bios/uefi

Apr 1, 2018
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So I have an old zoostorm 7000 series desktop with a foxconn g31mx motherboard. I'm currently trying to update the OS from a bootable usb but I can't for the life of me get into the bios I've tried every key imaginable, checked foxconns website to see what they say and I get nothing does anyone have any ideas