Hard Reset D-Link Router Setup
How to Hard Reset D-LINK DSL-5300:
- Make sure your router is plugged in.
- Find your router's reset button at the back of your device.

- Use a pen, paperclip or any long and thin object and hold down the button for a while.
- After a while, you can release the button.
- Now just wait for the router to power on again.
- Good job! You've reset your D-LINK DSL-5300!
https://www.hardreset.info