Hi there, hoping someone can advise me on trouble with a new EZ Flash IV. I just got a one of the newest EZ Flash IV carts, and it worked great for two days. Now, when I start it up, it does not load anything: I get the EZPDA splash screen, but no dialog boxes or menu. I have tried swapping in other Micro SD cards and reformatting (using various tools) the one that has been working so far, and nothing changes. The only response I can elicit is that if I insert a 64GB Micro SD card, which is too big for the cart to read, it will actually load the menu, letting me access the file browser and settings, I can even run the game that's loaded into NOR. But of course the cart can't read the SD card. When I put in an SD card of permitted size, I get the cart's splash screen with no response. I have tried upgrading the cart's firmware, which gets a black screen - it's as if the cart can't actually read the SD card. But I don't know why this doesn't happen when there is a card of incompatible size inserted. Any advice would be appreciated, thank you! Is my cart busted?