Can someone help me fix my calculator?

[flyingpig]

Homework Statement

My TI-84 plus is messed up, is there any way to reset the settings without erasing my programs?

edit: my graphing funciton only graphs one graph even though I imputed two.

There is this weird black arrow and a rectangle in all of my Yn

The Attempt at a Solution

 

[lewando]

You should look into using TI Connect^TM. I think it can be used to backup any important data/programs.

 

[MATLABdude]

You may have de-selected functions (see page 99 of the TI-84+ Manual--even if you have a TI-84, it should still apply)l:
http://education.ti.com/guidebooks/graphing/84p/TI84PlusGuidebook_Part2_EN.pdf

 

[flyingpig]

Nope it's not working, here is a picture of what it looks like. I drew it with hand so...

[PLAIN]http://img845.imageshack.us/img845/1909/unledmbl.jpg

 

[flyingpig]

Please...

 

[lewando]

Have you tried MEM (2nd, +)> Reset > Defaults? This will preserve your programs.

 

[flyingpig]

Have you tried MEM (2nd, +)> Reset > Defaults? This will preserve your programs.

Not working still.