I am using woodR4 and I had a hankering to play River City Ransom.  I updated nesDS to 1.0b and turned it on and BLACK SCREEN. I removed everything and formatted my sd card, still black screen.  I rolled back to 0.56a and still black screen.  I ran dldi on nesDS 0.56a and tried again and still 2 black screens.  I have removed all my nes roms and tried to run it, but still 2 black screens.  I tried with a known good rom and still no go.  What do I do??  Please help.  Also, I have all cheats, reset in game and reset in homebrew turned to OFF.  I am stumped.