the ds isn't bricked, might be a pin bent though (since it still starts normal when card is removed). but it could be it can't read the sd card, install latest fw and kernel of your card (wood is prefered if possible). install the files from another micro-sd card. if it's a supercard dstwo check instructions on thier website how to do a recovery (only card offering recovery mode). use original kernel or wood special designed for your card only. you can't use sw of other suppliers on your card most likely. if you can't find the f\kernal and firmware for your card, please send me a photo of your card, and i'll pm you where you can download a setup.