Can you erase everything on it?

Angel Loera, ifixit don't do repairs :-) Here you get advice for fixing it yourself. Try this for a reset:" Master reset using hardware keys

A master reset (factory reset) restores the original factory settings and erases all user data (including settings and downloaded content) stored in the phone’s internal memory. It does not erase data stored on the SIM card or memory card (if available).

Note: If the handset is locked, frozen, or unresponsive, you can perform a master reset using the hardware keys instead of the menu.

To perform a master reset using hardware keys, follow these steps:

Back up all necessary data that is on the internal memory.

Turn off the device.

Press and hold these three buttons at the same time: Volume Up key, Home key, and Power key.

When the phone vibrates, let go of the Power key but continue to press and hold the Volume Up key and the Home key.

When the Android System Recovery screen appears, let go of the Power Up and Home keys.

Press the Volume Down key to highlight wipe data / factory reset.

Press the Power key to select.

Press the Volume Down key to highlight Yes -- delete all user data.

Press the Power key to select.

The master reset is enacted.

When the master reset is finished, with reboot system now highlighted, press the Power key to restart the phone." you might also want to check this video. Hope this helps, good luck