My Dsi doesn't start any game or system app, but the menu works.

When I turn it on, it loads the menu perfectly fine.

But if I try to open my card’s game, or any other app (camera, flipnote, settings), it always crashes and tells me:

Error has occured. Press and hold the power button to turn off

If I press L or R, the camera on the menu opens and works fine, but if I close it, the dsi suddenly stops to accept any input.

I know that the console is over 10 years old, but I still want it to revive, since it used to be a huge part of my childhood.