Screen frozen calculator not responding to buttons pressed
The calculator has become unresponsive to buttons being pressed, except 2nd function button(blue) and diamond button (green)
Office Equipment & Supplies - Texas Instruments - TI-89 Calculator
Answers & Comments
Give it a factory reset, this works, you will lose any unarchived data : http://www.associatedcontent.com/video/265/how_to_reset_a_texas_instruments_ti89.html?cat=59