How do I fix my system

i was playing my pokemon alpha saffhire and when i was fighting a hacker i got angry and threw my system at the wall the bottem of the system flew off and the battery came out and they system turned off so i put the battery back it and taped the bottem back on and turned on my system but heres the thing i have the black screen of death and i mean completly black wheather i turn my system on or off it looks like its always off is there a way i can fix it without going to get it fixed by someone or possibly buying a new one because if my parents find out they will kill me