I know this, but I can believe that they can BRICK a flashcart. And when is bricked it can't be read from any DS, even fat and lite.Nintendo stopped blocking DS flashcarts since version 7.x

My 3ds bricked an r4 3 years ago, when I was with 6.x.x firmwareWhere did you hear that the 3DS bricks flashcards?

I never updated it... but what is a timebomb cart?Probably a timebomb cart or it failed when updating.
timebomb carts are usually clone carts that just stop working after a certain time, "forcing" you to buy another one.I never updated it... but what is a timebomb cart?
some of those carts can be tricked by setting the date a few years/months back
Send a picture of your cart.Ah. If I had one it can stopped working after my time travels in Animal Crossing New Leaf...
But how i can understand if a cart is ok or is a timebomb one? I can't buy online, and because of this I buy the flashcarts in phone shops (yes, in Italy some shops sells flashcarts). The next time I'll ask for an acekard 2.