Dsi wont charge or turn on!

Check the charging port and make sure its not out of place. If that's not the case, then check the battery for continuity with a multimeter. If that's still good, then you have to check for continuity in the f1 and f2 fuses. The f1 fuse is located under the secondary motherboard which is to the right of the main motherboard. The f2 fuse is located right nest to the charging port.