Solution 12087: Clock Will Not Display on a TI-89 or TI-92 Plus Graphing Calculator with Operating System (OS) 2.08 or Above.
Why does the clock not display on a TI-89 or TI-92 Plus with operating system (OS) 2.08 or above?The clock features of the latest OS's will not function on a TI-89 and TI-92 Plus (or TI-92 with a Plus Module) with hardware version 1.
To determine if a calculator has a hardware version 1 unit:
• On the Home Screen, with custom menus disabled, press [F1], and choose option A for About...
• The About screen will list either hardware version 1 or hardware version 2.