How Do I Fix My TI-84 Calculator Not Graphing Simultaneous Equations?

[Sniperman724]

I wasn't sure where to lost this thread so I decided to put it in general discussion. So anyway, on my TI-84 graphing calculator I have been having this weird problem, once in a while a setting will change on its own( not sure how) and then the calculator would stop letting me graph simultaneous equations, and would only graph one function at a time. Usually when you hit the y= button, there would be parallel lines to the left of each function line but for the past few weeks that symbol changed into a triangle and an upright rectangle(for lack of a better description) to the left of the function lines. I am really not sure how to change it back to parallel lines again. If you can help me out that would be great :)

Thank you so much!

 

[Sniperman724]

I just cannot figure out how to fix it... :/

 

[niko_bellic]

In one problem I may helpful to you..
If u remove batteries or change batteries while TI calculators are on operation then the settings will be changed to default and whole memory (programs) will be erased.

 

[Sniperman724]

Thank you for your help, When I was playing around with my calculator, i guess i must have hit this program called "transfrm" on accident, so when i uninstalled it, I was able to graph simultaneous equations again, and it fixed all of the other problems as well.

 

[LudusRex]

I would suggest first checking the user manual for your TI-84 calculator to see if there are any troubleshooting tips for this specific issue. If that does not provide a solution, I would recommend resetting the calculator to its default settings. This can usually be done by pressing the "2nd" button and then "MEM" (memory) and selecting "Reset" or "Defaults." If the issue persists, it may be a hardware issue and I would suggest contacting the manufacturer for assistance. It is also important to regularly update the software on your calculator to avoid potential bugs or glitches.