if I remove my microsd to install something custom firmware related and put it back in, something strange happens. I press the power button and the blue light comes on for about half a second and goes off no matter how many times I press it. The only way round it seems to be: remove sd, turn on 3ds, while 3ds is on re insert sd, turn off, turn on, turn off again then the next power on will be successful. Is there a more practical way around this?