If you haven't already done so, reference as much info as you'd like
http://www.akaipro.com/mpc4000. I kinda trust more from the source rather than hear say or folk lore.
And as a reference to the 16 megs, it's what's imbeded on the main board. All 4k's come like this until you add or upgrade the memory.
If this is the case with you not seeing nothing but 16 megs, then you need to see if the ram was removed, or it's not seated right, or bad. It's gotta be one of the three.
And the front usb port is for usb keyboards, thumb drives or whatever works. You'll probably want the back usb for hd's.
