I broke my old ds while trying to fix another one using the bios swap method, i broke the switch that turns the ds on and i lost some of the parts for the R button on my ds and the L button on my friends, if anyone knows where i can replace the L and R button then let me know, as for the power switch, i'm ordering one in now. ANYWAYS, to my problem now, i bought a new ds to hold me off until i fix my old one, however, the new ds won't read my r4 or m3. At first i thought that the part to read cards was simply disconnected, then i tested a real game and that worked. So, this makes me think that the ds is new and won't read r4. Can any1 tell me how i can fix this?