A while ago I bought an R4, worked great, until one day, I was playing Assassin's Creed, and I decided to take a break and simple close the ds, while holding it and the ds being closed AND on, I accidentally popped out the cartridge, I quickly re-inserted it and opened it. Both screens were black, nothing written. I turned off my DS and turned it back on and selected the cartridge channel. I selected the cartridge icon as usual, but it said"an error has occured, please refer to user's manual etc." I tried various flashcarts, including acekard 2i, it did not work. They all have the same problem. I've figured that by now the problem is not the flashcarts, the DS itself(My DS is a DSi XL 1.4.1E and yes I bought the cartridges with the 1.4.1 update, could someone please help me with this? What's the solution to this extremely frustrating problem? I've tried everything, but nothing has worked, PLEASE, share your wisdom and help me out!!!!!!