Just dug the old DSlite out of the drawer, with its edge card (NOT iedge) still inside. Sadly the microsd has been formatted over a few times.
Any pointers for some help?
Have you already tried the firmware from the official site. if it is not working, i suggest you buy another better flashcart instead, r4i gold 3ds flashcart will be a cheap choice.
Do yourself a favor, don't buy crappy flashcarts.