Okay, I'm going crazy.
I'm working on a computer that will be in a bartop.  I'm using DMAMEPP 074b (DOS Mame for i686) and the latest ArcadeOS.  About 75% of the time, I'm getting a black screen when I attempt to start the ROM.  The other 25% it works fine.
It passes the command line fine.  The command line goes away and I simply get a blank black screen.  The only way to exit this is to power the computer off.  Escape doesn't work and even Ctrl+Alt+Del doesn't work.
Hopefully someone will have some input.
Thanks!!