Console does not register or read the Game Cartridge.
1. Check the connector pins of your Game Cards or Game Paks. If you see any discolouration, contamination or foreign material this could indicate damage from a liquid or foreign substance. In this case, the warranty becomes void and repair charges will apply.
If discolouration, contamination or foreign material is detected, the Nintendo DSi and/or any affected Game Cards or Game Paks will need to be returned to Nintendo Australia for inspection/repair.
2. Check if it is one or all of the games that have an issue. Verify this by testing another game in the Nintendo DSi. If this corrects the problem the cartridge is at fault and not the unit.