Trying to update BIOS in my Dell Dimension 9200 - F2 not doing the trick

Trying to update my BIOS because I just upgraded my video card. (Had to!  Windows 10 won't load  because the original card is too old.)  The directions suggest I check the BIOS to insure that my "Primary Display Adapter is set to PCI."  I haven't accessed the BIOS in ages.  I press F2 on startup, but nothing happens.  I have tried this several times.  Tapping, keeping it pressed, etc.  Could this not be working because I have a wireless keyboard and it hasn't "connected" yet upon startup?  That's my theory anyway.  And is this necessary at all?  (Yeah, I tossed the old USB keyboard a long time ago.)

Any advice would be appreciated.  Thnx.