How to factory/hard reset your Nintendo DS Lite settings
Selling your DS? Or just playing around? Either way, factory resetting your DS isn't hard at all, as long as you follow directions carefully. Without further ado, I will explain on how to factory reset your DS.
Step 1. Turn your DS over, so you are facing the back of it. Now, you will see a screw on the left or right, depending on what position your DS is in, of your DS. Unscrew the screw. This will take very small screw. A #00 should work fine though.
Step 2. Keep the battery out for at least 1 minute. Then replace the battery and put the cover back on.
Step 3. Turn on your DS. Your DS will be reset to factory settings.
I hope that this worked for you. This has only been tested on a DS lite, but it should work for the other DS's types too. Thanks for reading