Unhappy Starting over

I've messes up my nook in ways i no longer under stand and i wanted to phone if there is an file i can flash to start over to square one, stock rom. i have the cyanboot on it, cmw is no longer there(i messed that up trying to installing semi stock rom) and nothing will flash, i cant tell if im charging it i just plug it in and it stays on the cyanboot screen can someone help? i just wanna start over