How do you reset TI-83 plus to default values?

A simple way to reset your calculator to default values would be to take out the batteries. Taking out the AAA batteries that you usually change will have no effect on the settings. If you take off the battery cover, above the AAA's there is a little silver screw. If you unscrew this little screw there is a very small battery under it. This little battery saves your settings wile you change the AAA batteries. If you take out this little battery as well as the AAAs your calculator should reset it's self to default values.