Оригинальный сообщение: pollytintop ,
I'd open the dsi following the guide to the right under the photo. Remove the d- board (the little mini board that the battery sits on) turn it over and you will find the F1 fuse, check with a multimeter but I suspect the greatest damage you've done is blown that fuse. You can buy the d-board separately on ebay. I bought mine for under 5uk pounds. It's a whole heap cheaper than a new motherboard..