Dead screen after reformat

[EL_INCA247]

Hi all, i recently purchase a nano clone 2 gig mp4 player. I reformatted it. As soon as the reformat was complete the screen went black. I thought i screwed up the firmware. When i plug it to my computer it recognizes it and i can add music using the media manger that came with it. any clues on how i can get my screen to work. I've already tried firmware update. please help...

[lattesurf]

EL_INCA247 , do you still remember your previous working firmware version number?